20451060 has 72 divisors (see below), whose sum is σ = 70901376. Its totient is φ = 4674240.

The previous prime is 20451059. The next prime is 20451073. The reversal of 20451060 is 6015402.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6856 + ... + 9375.

Almost surely, 2^20451060 is an apocalyptic number.

20451060 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20451060 is an abundant number, since it is smaller than the sum of its proper divisors (50450316).

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

20451060 is a wasteful number, since it uses less digits than its factorization.

20451060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16253 (or 16248 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 20451060 is about 4522.2848207516. The cubic root of 20451060 is about 273.4672190936.

Adding to 20451060 its reverse (6015402), we get a palindrome (26466462).

The spelling of 20451060 in words is "twenty million, four hundred fifty-one thousand, sixty".