20534256 has 40 divisors (see below), whose sum is σ = 58942160. Its totient is φ = 6844608.

The previous prime is 20534237. The next prime is 20534257. The reversal of 20534256 is 65243502.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20534257) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 23335 + ... + 24198.

It is an arithmetic number, because the mean of its divisors is an integer number (1473554).

Almost surely, 2^20534256 is an apocalyptic number.

It is an amenable number.

20534256 is an abundant number, since it is smaller than the sum of its proper divisors (38407904).

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

20534256 is a wasteful number, since it uses less digits than its factorization.

20534256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47550 (or 47538 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 20534256 is about 4531.4739323977. The cubic root of 20534256 is about 273.8375437781.

Adding to 20534256 its reverse (65243502), we get a palindrome (85777758).

The spelling of 20534256 in words is "twenty million, five hundred thirty-four thousand, two hundred fifty-six".