20974888 has 32 divisors (see below), whose sum is σ = 44388000. Its totient is φ = 9204160.

The previous prime is 20974883. The next prime is 20974901. The reversal of 20974888 is 88847902.

It is a super-2 number, since 2×20974888² = 879891853225088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20974883) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1558 + ... + 6661.

It is an arithmetic number, because the mean of its divisors is an integer number (1387125).

Almost surely, 2^20974888 is an apocalyptic number.

It is an amenable number.

20974888 is an abundant number, since it is smaller than the sum of its proper divisors (23413112).

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

20974888 is a wasteful number, since it uses less digits than its factorization.

20974888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8265 (or 8261 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 46.

The square root of 20974888 is about 4579.8349315232. The cubic root of 20974888 is about 275.7824021804.

The spelling of 20974888 in words is "twenty million, nine hundred seventy-four thousand, eight hundred eighty-eight".