20252688 has 60 divisors (see below), whose sum is σ = 53840304. Its totient is φ = 6560000.

The previous prime is 20252663. The next prime is 20252707. The reversal of 20252688 is 88625202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 80563 + ... + 80813.

Almost surely, 2^20252688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20252688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26920152).

20252688 is an abundant number, since it is smaller than the sum of its proper divisors (33587616).

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

20252688 is a wasteful number, since it uses less digits than its factorization.

20252688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344 (or 297 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 33.

The square root of 20252688 is about 4500.2986567560. The cubic root of 20252688 is about 272.5801486879.

The spelling of 20252688 in words is "twenty million, two hundred fifty-two thousand, six hundred eighty-eight".