20655960 has 64 divisors (see below), whose sum is σ = 66739680. Its totient is φ = 5084160.

The previous prime is 20655941. The next prime is 20655967. The reversal of 20655960 is 6955602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20655967) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5061 + ... + 8180.

Almost surely, 2^20655960 is an apocalyptic number.

20655960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20655960 is an abundant number, since it is smaller than the sum of its proper divisors (46083720).

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

20655960 is a wasteful number, since it uses less digits than its factorization.

20655960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13268 (or 13264 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 33.

The square root of 20655960 is about 4544.8828367737. The cubic root of 20655960 is about 274.3774789066.

The spelling of 20655960 in words is "twenty million, six hundred fifty-five thousand, nine hundred sixty".