20164351 has 4 divisors (see below), whose sum is σ = 20179432. Its totient is φ = 20149272.

The previous prime is 20164349. The next prime is 20164357. The reversal of 20164351 is 15346102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15346102 = 2 ⋅7673051.

It is a cyclic number.

It is not a de Polignac number, because 20164351 - 2¹ = 20164349 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20164357) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5316 + ... + 8281.

It is an arithmetic number, because the mean of its divisors is an integer number (5044858).

Almost surely, 2^20164351 is an apocalyptic number.

20164351 is a deficient number, since it is larger than the sum of its proper divisors (15081).

20164351 is a wasteful number, since it uses less digits than its factorization.

20164351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15080.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 20164351 is about 4490.4733603486. The cubic root of 20164351 is about 272.1832629948.

The spelling of 20164351 in words is "twenty million, one hundred sixty-four thousand, three hundred fifty-one".