20604951 has 12 divisors (see below), whose sum is σ = 29804112. Its totient is φ = 13717536.

The previous prime is 20604931. The next prime is 20604959. The reversal of 20604951 is 15940602.

20604951 is a `hidden beast` number, since 2 + 0 + 604 + 9 + 51 = 666.

It is not a de Polignac number, because 20604951 - 2⁷ = 20604823 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20604959) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8830 + ... + 10916.

It is an arithmetic number, because the mean of its divisors is an integer number (2483676).

Almost surely, 2^20604951 is an apocalyptic number.

20604951 is a deficient number, since it is larger than the sum of its proper divisors (9199161).

20604951 is a wasteful number, since it uses less digits than its factorization.

20604951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3190 (or 3187 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 20604951 is about 4539.2676722132. The cubic root of 20604951 is about 274.1514382987.

The spelling of 20604951 in words is "twenty million, six hundred four thousand, nine hundred fifty-one".