20888456 has 16 divisors (see below), whose sum is σ = 39751440. Its totient is φ = 10288080.

The previous prime is 20888449. The next prime is 20888473. The reversal of 20888456 is 65488802.

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, 18950 + ... + 20021.

It is an arithmetic number, because the mean of its divisors is an integer number (2484465).

Almost surely, 2^20888456 is an apocalyptic number.

It is an amenable number.

20888456 is a deficient number, since it is larger than the sum of its proper divisors (18862984).

20888456 is a wasteful number, since it uses less digits than its factorization.

20888456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39044 (or 39040 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 41.

The square root of 20888456 is about 4570.3890425214. The cubic root of 20888456 is about 275.4030717328.

The spelling of 20888456 in words is "twenty million, eight hundred eighty-eight thousand, four hundred fifty-six".