20927964 has 24 divisors (see below), whose sum is σ = 49109760. Its totient is φ = 6936304.

The previous prime is 20927957. The next prime is 20927981. The reversal of 20927964 is 46972902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2724 + ... + 7019.

It is an arithmetic number, because the mean of its divisors is an integer number (2046240).

Almost surely, 2^20927964 is an apocalyptic number.

It is an amenable number.

20927964 is an abundant number, since it is smaller than the sum of its proper divisors (28181796).

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

20927964 is a wasteful number, since it uses less digits than its factorization.

20927964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9929 (or 9927 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 20927964 is about 4574.7091710840. The cubic root of 20927964 is about 275.5765929664.

The spelling of 20927964 in words is "twenty million, nine hundred twenty-seven thousand, nine hundred sixty-four".