20604056 has 32 divisors (see below), whose sum is σ = 44366400. Its totient is φ = 8871840.

The previous prime is 20604047. The next prime is 20604107. The reversal of 20604056 is 65040602.

It is a super-2 number, since 2×20604056² = 849054247302272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4490 + ... + 7833.

It is an arithmetic number, because the mean of its divisors is an integer number (1386450).

Almost surely, 2^20604056 is an apocalyptic number.

It is an amenable number.

20604056 is an abundant number, since it is smaller than the sum of its proper divisors (23762344).

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

20604056 is a wasteful number, since it uses less digits than its factorization.

20604056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12359 (or 12355 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 20604056 is about 4539.1690869585. The cubic root of 20604056 is about 274.1474688791.

Adding to 20604056 its reverse (65040602), we get a palindrome (85644658).

It can be divided in two parts, 2060 and 4056, that added together give a palindrome (6116).

The spelling of 20604056 in words is "twenty million, six hundred four thousand, fifty-six".