20729604 has 24 divisors (see below), whose sum is σ = 55279168. Its totient is φ = 5922720.

The previous prime is 20729573. The next prime is 20729617. The reversal of 20729604 is 40692702.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123307 + ... + 123474.

Almost surely, 2^20729604 is an apocalyptic number.

It is an amenable number.

20729604 is an abundant number, since it is smaller than the sum of its proper divisors (34549564).

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

20729604 is a wasteful number, since it uses less digits than its factorization.

20729604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246795 (or 246793 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 20729604 is about 4552.9774873153. The cubic root of 20729604 is about 274.7031684242.

The spelling of 20729604 in words is "twenty million, seven hundred twenty-nine thousand, six hundred four".