20927912 has 8 divisors (see below), whose sum is σ = 39239850. Its totient is φ = 10463952.

The previous prime is 20927899. The next prime is 20927923. The reversal of 20927912 is 21972902.

It can be written as a sum of positive squares in only one way, i.e., 19061956 + 1865956 = 4366^2 + 1366^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1307987 + ... + 1308002.

Almost surely, 2^20927912 is an apocalyptic number.

It is an amenable number.

20927912 is a deficient number, since it is larger than the sum of its proper divisors (18311938).

20927912 is a wasteful number, since it uses less digits than its factorization.

20927912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2615995 (or 2615991 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 20927912 is about 4574.7034876591. The cubic root of 20927912 is about 275.5763647233.

The spelling of 20927912 in words is "twenty million, nine hundred twenty-seven thousand, nine hundred twelve".