20164651 has 8 divisors (see below), whose sum is σ = 21941024. Its totient is φ = 18420480.

The previous prime is 20164649. The next prime is 20164733. The reversal of 20164651 is 15646102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20164651 - 2¹ = 20164649 is a prime.

It is a super-2 number, since 2×20164651² = 813226299903602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20164621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6735 + ... + 9256.

It is an arithmetic number, because the mean of its divisors is an integer number (2742628).

Almost surely, 2^20164651 is an apocalyptic number.

20164651 is a deficient number, since it is larger than the sum of its proper divisors (1776373).

20164651 is a wasteful number, since it uses less digits than its factorization.

20164651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16101.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 20164651 is about 4490.5067642751. The cubic root of 20164651 is about 272.1846128122.

The spelling of 20164651 in words is "twenty million, one hundred sixty-four thousand, six hundred fifty-one".