20654916 has 12 divisors (see below), whose sum is σ = 48194832. Its totient is φ = 6884968.

The previous prime is 20654903. The next prime is 20654923. The reversal of 20654916 is 61945602.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 860610 + ... + 860633.

It is an arithmetic number, because the mean of its divisors is an integer number (4016236).

Almost surely, 2^20654916 is an apocalyptic number.

It is an amenable number.

20654916 is an abundant number, since it is smaller than the sum of its proper divisors (27539916).

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

20654916 is a wasteful number, since it uses less digits than its factorization.

20654916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1721250 (or 1721248 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 20654916 is about 4544.7679808765. The cubic root of 20654916 is about 274.3728562712.

The spelling of 20654916 in words is "twenty million, six hundred fifty-four thousand, nine hundred sixteen".