20945968 has 10 divisors (see below), whose sum is σ = 40582844. Its totient is φ = 10472976.

The previous prime is 20945941. The next prime is 20946017. The reversal of 20945968 is 86954902.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 654546 + ... + 654577.

Almost surely, 2^20945968 is an apocalyptic number.

It is an amenable number.

20945968 is a deficient number, since it is larger than the sum of its proper divisors (19636876).

20945968 is a wasteful number, since it uses less digits than its factorization.

20945968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1309131 (or 1309125 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 20945968 is about 4576.6765234174. The cubic root of 20945968 is about 275.6555950598.

The spelling of 20945968 in words is "twenty million, nine hundred forty-five thousand, nine hundred sixty-eight".