20949772 has 18 divisors (see below), whose sum is σ = 37622508. Its totient is φ = 10201968.

The previous prime is 20949767. The next prime is 20949809. The reversal of 20949772 is 27794902.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 59854 + ... + 60202.

Almost surely, 2^20949772 is an apocalyptic number.

It is an amenable number.

20949772 is a deficient number, since it is larger than the sum of its proper divisors (16672736).

20949772 is an equidigital number, since it uses as much as digits as its factorization.

20949772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 745 (or 394 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 20949772 is about 4577.0920899628. The cubic root of 20949772 is about 275.6722813327.

The spelling of 20949772 in words is "twenty million, nine hundred forty-nine thousand, seven hundred seventy-two".