20164730 has 32 divisors (see below), whose sum is σ = 37195200. Its totient is φ = 7869312.

The previous prime is 20164649. The next prime is 20164733. The reversal of 20164730 is 3746102.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20164696 and 20164705.

It is not an unprimeable number, because it can be changed into a prime (20164733) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 123629 + ... + 123791.

It is an arithmetic number, because the mean of its divisors is an integer number (1162350).

Almost surely, 2^20164730 is an apocalyptic number.

20164730 is a deficient number, since it is larger than the sum of its proper divisors (17030470).

20164730 is a wasteful number, since it uses less digits than its factorization.

20164730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 20164730 is about 4490.5155606010. The cubic root of 20164730 is about 272.1849682618.

The spelling of 20164730 in words is "twenty million, one hundred sixty-four thousand, seven hundred thirty".