20974568 has 24 divisors (see below), whose sum is σ = 39871650. Its totient is φ = 10343904.

The previous prime is 20974567. The next prime is 20974589. The reversal of 20974568 is 86547902.

It can be written as a sum of positive squares in only one way, i.e., 13235044 + 7739524 = 3638^2 + 2782^2 .

It is not an unprimeable number, because it can be changed into a prime (20974561) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 91478 + ... + 91706.

Almost surely, 2^20974568 is an apocalyptic number.

It is an amenable number.

20974568 is a deficient number, since it is larger than the sum of its proper divisors (18897082).

20974568 is a wasteful number, since it uses less digits than its factorization.

20974568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449 (or 338 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 20974568 is about 4579.7999956330. The cubic root of 20974568 is about 275.7809996967.

The spelling of 20974568 in words is "twenty million, nine hundred seventy-four thousand, five hundred sixty-eight".