20556088 has 48 divisors (see below), whose sum is σ = 45964800. Its totient is φ = 8588160.

The previous prime is 20556079. The next prime is 20556113. The reversal of 20556088 is 88065502.

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, 15433 + ... + 16711.

It is an arithmetic number, because the mean of its divisors is an integer number (957600).

Almost surely, 2^20556088 is an apocalyptic number.

20556088 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20556088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22982400).

20556088 is an abundant number, since it is smaller than the sum of its proper divisors (25408712).

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

20556088 is a wasteful number, since it uses less digits than its factorization.

20556088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1340 (or 1329 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 34.

The square root of 20556088 is about 4533.8822216727. The cubic root of 20556088 is about 273.9345573369.

The spelling of 20556088 in words is "twenty million, five hundred fifty-six thousand, eighty-eight".