20955788 has 24 divisors (see below), whose sum is σ = 42014112. Its totient is φ = 8959104.

The previous prime is 20955761. The next prime is 20955793. The reversal of 20955788 is 88755902.

It is an unprimeable number.

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, 16670 + ... + 17882.

It is an arithmetic number, because the mean of its divisors is an integer number (1750588).

Almost surely, 2^20955788 is an apocalyptic number.

20955788 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20955788 is an abundant number, since it is smaller than the sum of its proper divisors (21058324).

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

20955788 is a wasteful number, since it uses less digits than its factorization.

20955788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1841 (or 1839 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 44.

The square root of 20955788 is about 4577.7492286057. The cubic root of 20955788 is about 275.6986664364.

The spelling of 20955788 in words is "twenty million, nine hundred fifty-five thousand, seven hundred eighty-eight".