20129764 has 12 divisors (see below), whose sum is σ = 35386624. Its totient is φ = 10019304.

The previous prime is 20129749. The next prime is 20129773. The reversal of 20129764 is 46792102.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10392 + ... + 12175.

Almost surely, 2^20129764 is an apocalyptic number.

It is an amenable number.

20129764 is a deficient number, since it is larger than the sum of its proper divisors (15256860).

20129764 is a wasteful number, since it uses less digits than its factorization.

20129764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22794 (or 22792 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 20129764 is about 4486.6205544931. The cubic root of 20129764 is about 272.0275527164.

The spelling of 20129764 in words is "twenty million, one hundred twenty-nine thousand, seven hundred sixty-four".