63520020 has 144 divisors (see below), whose sum is σ = 204946560. Its totient is φ = 15890688.

The previous prime is 63519977. The next prime is 63520031. The reversal of 63520020 is 2002536.

63520020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 63519975 and 63520002.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 277266 + ... + 277494.

It is an arithmetic number, because the mean of its divisors is an integer number (1423240).

Almost surely, 2^63520020 is an apocalyptic number.

63520020 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63520020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102473280).

63520020 is an abundant number, since it is smaller than the sum of its proper divisors (141426540).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

63520020 is a wasteful number, since it uses less digits than its factorization.

63520020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334 (or 329 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 63520020 is about 7969.9447927824. The cubic root of 63520020 is about 398.9975314073.

Adding to 63520020 its reverse (2002536), we get a palindrome (65522556).

The spelling of 63520020 in words is "sixty-three million, five hundred twenty thousand, twenty".