20254564 has 24 divisors (see below), whose sum is σ = 38808000. Its totient is φ = 9173280.

The previous prime is 20254547. The next prime is 20254567. The reversal of 20254564 is 46545202.

It is not an unprimeable number, because it can be changed into a prime (20254567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14697 + ... + 16015.

It is an arithmetic number, because the mean of its divisors is an integer number (1617000).

Almost surely, 2^20254564 is an apocalyptic number.

It is an amenable number.

20254564 is a deficient number, since it is larger than the sum of its proper divisors (18553436).

20254564 is a wasteful number, since it uses less digits than its factorization.

20254564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1683 (or 1681 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 20254564 is about 4500.5070825408. The cubic root of 20254564 is about 272.5885647653.

Adding to 20254564 its reverse (46545202), we get a palindrome (66799766).

The spelling of 20254564 in words is "twenty million, two hundred fifty-four thousand, five hundred sixty-four".