20520486 has 32 divisors (see below), whose sum is σ = 52116480. Its totient is φ = 5862888.

The previous prime is 20520433. The next prime is 20520499. The reversal of 20520486 is 68402502.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26766 + ... + 27521.

It is an arithmetic number, because the mean of its divisors is an integer number (1628640).

Almost surely, 2^20520486 is an apocalyptic number.

20520486 is an abundant number, since it is smaller than the sum of its proper divisors (31595994).

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

20520486 is a wasteful number, since it uses less digits than its factorization.

20520486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54305 (or 54299 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 20520486 is about 4529.9543044053. The cubic root of 20520486 is about 273.7763194811.

Adding to 20520486 its reverse (68402502), we get a palindrome (88922988).

The spelling of 20520486 in words is "twenty million, five hundred twenty thousand, four hundred eighty-six".