20214656 has 96 divisors (see below), whose sum is σ = 51279480. Its totient is φ = 7848960.

The previous prime is 20214647. The next prime is 20214661. The reversal of 20214656 is 65641202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68846 + ... + 69138.

Almost surely, 2^20214656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20214656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25639740).

20214656 is an abundant number, since it is smaller than the sum of its proper divisors (31064824).

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

20214656 is a wasteful number, since it uses less digits than its factorization.

20214656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332 (or 313 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 20214656 is about 4496.0711738139. The cubic root of 20214656 is about 272.4094180314.

Adding to 20214656 its reverse (65641202), we get a palindrome (85855858).

It can be divided in two parts, 202146 and 56, that added together give a palindrome (202202).

The spelling of 20214656 in words is "twenty million, two hundred fourteen thousand, six hundred fifty-six".