20160729 has 12 divisors (see below), whose sum is σ = 30654000. Its totient is φ = 12732984.

The previous prime is 20160727. The next prime is 20160739. The reversal of 20160729 is 92706102.

It is not a de Polignac number, because 20160729 - 2¹ = 20160727 is a prime.

It is a super-2 number, since 2×20160729² = 812909987622882, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20160727) 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, 58779 + ... + 59120.

It is an arithmetic number, because the mean of its divisors is an integer number (2554500).

Almost surely, 2^20160729 is an apocalyptic number.

It is an amenable number.

20160729 is a deficient number, since it is larger than the sum of its proper divisors (10493271).

20160729 is a wasteful number, since it uses less digits than its factorization.

20160729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117924 (or 117921 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 20160729 is about 4490.0700439971. The cubic root of 20160729 is about 272.1669651430.

The spelling of 20160729 in words is "twenty million, one hundred sixty thousand, seven hundred twenty-nine".