20604974 has 16 divisors (see below), whose sum is σ = 33375888. Its totient is φ = 9484032.

The previous prime is 20604973. The next prime is 20605019. The reversal of 20604974 is 47940602.

It is a self number, because there is not a number n which added to its sum of digits gives 20604974.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20604973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11294 + ... + 12990.

It is an arithmetic number, because the mean of its divisors is an integer number (2085993).

Almost surely, 2^20604974 is an apocalyptic number.

20604974 is a deficient number, since it is larger than the sum of its proper divisors (12770914).

20604974 is a wasteful number, since it uses less digits than its factorization.

20604974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2179.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 20604974 is about 4539.2702056608. The cubic root of 20604974 is about 274.1515403046.

The spelling of 20604974 in words is "twenty million, six hundred four thousand, nine hundred seventy-four".