20755868 has 24 divisors (see below), whose sum is σ = 41983200. Its totient is φ = 8794368.

The previous prime is 20755841. The next prime is 20755877. The reversal of 20755868 is 86855702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1673 + ... + 6656.

It is an arithmetic number, because the mean of its divisors is an integer number (1749300).

Almost surely, 2^20755868 is an apocalyptic number.

20755868 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20755868 is an abundant number, since it is smaller than the sum of its proper divisors (21227332).

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

20755868 is a wasteful number, since it uses less digits than its factorization.

20755868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8429 (or 8427 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 41.

The square root of 20755868 is about 4555.8608407193. The cubic root of 20755868 is about 274.8191339640.

The spelling of 20755868 in words is "twenty million, seven hundred fifty-five thousand, eight hundred sixty-eight".