20290688 has 32 divisors (see below), whose sum is σ = 44100720. Its totient is φ = 9222400.

The previous prime is 20290661. The next prime is 20290693. The reversal of 20290688 is 88609202.

It is a tau number, because it is divible by the number of its divisors (32).

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, 5798 + ... + 8613.

Almost surely, 2^20290688 is an apocalyptic number.

It is an amenable number.

20290688 is an abundant number, since it is smaller than the sum of its proper divisors (23810032).

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

20290688 is a wasteful number, since it uses less digits than its factorization.

20290688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14436 (or 14424 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 20290688 is about 4504.5186202301. The cubic root of 20290688 is about 272.7505223546.

The spelling of 20290688 in words is "twenty million, two hundred ninety thousand, six hundred eighty-eight".