20604964 has 24 divisors (see below), whose sum is σ = 38928960. Its totient is φ = 9513504.

The previous prime is 20604959. The next prime is 20604973. The reversal of 20604964 is 46940602.

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, 1194 + ... + 6529.

It is an arithmetic number, because the mean of its divisors is an integer number (1622040).

Almost surely, 2^20604964 is an apocalyptic number.

It is an amenable number.

20604964 is a deficient number, since it is larger than the sum of its proper divisors (18323996).

20604964 is a wasteful number, since it uses less digits than its factorization.

20604964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7779 (or 7777 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 20604964 is about 4539.2691041620. The cubic root of 20604964 is about 274.1514959542.

The spelling of 20604964 in words is "twenty million, six hundred four thousand, nine hundred sixty-four".