20312888 has 16 divisors (see below), whose sum is σ = 38388480. Its totient is φ = 10075968.

The previous prime is 20312869. The next prime is 20312911. The reversal of 20312888 is 88821302.

It is a super-2 number, since 2×20312888² = 825226837801088, which contains 22 as substring.

It is a congruent number.

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, 8981 + ... + 11012.

It is an arithmetic number, because the mean of its divisors is an integer number (2399280).

Almost surely, 2^20312888 is an apocalyptic number.

It is an amenable number.

20312888 is a deficient number, since it is larger than the sum of its proper divisors (18075592).

20312888 is a wasteful number, since it uses less digits than its factorization.

20312888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20126 (or 20122 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 20312888 is about 4506.9821388597. The cubic root of 20312888 is about 272.8499580278.

The spelling of 20312888 in words is "twenty million, three hundred twelve thousand, eight hundred eighty-eight".