20472570 has 24 divisors (see below), whose sum is σ = 53228916. Its totient is φ = 5459328.

The previous prime is 20472559. The next prime is 20472583. The reversal of 20472570 is 7527402.

20472570 is a `hidden beast` number, since 20 + 4 + 72 + 570 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 19474569 + 998001 = 4413^2 + 999^2 .

It is a super-2 number, since 2×20472570² = 838252244809800, which contains 22 as substring.

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 11 ways as a sum of consecutive naturals, for example, 113647 + ... + 113826.

Almost surely, 2^20472570 is an apocalyptic number.

20472570 is an abundant number, since it is smaller than the sum of its proper divisors (32756346).

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

20472570 is a wasteful number, since it uses less digits than its factorization.

20472570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227486 (or 227483 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 27.

The square root of 20472570 is about 4524.6624183468. The cubic root of 20472570 is about 273.5630612130.

Adding to 20472570 its reverse (7527402), we get a palindrome (27999972).

The spelling of 20472570 in words is "twenty million, four hundred seventy-two thousand, five hundred seventy".