20356164 has 24 divisors (see below), whose sum is σ = 52775520. Its totient is φ = 6785352.

The previous prime is 20356153. The next prime is 20356183. The reversal of 20356164 is 46165302.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94134 + ... + 94349.

It is an arithmetic number, because the mean of its divisors is an integer number (2198980).

Almost surely, 2^20356164 is an apocalyptic number.

It is an amenable number.

20356164 is an abundant number, since it is smaller than the sum of its proper divisors (32419356).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20356164 is a wasteful number, since it uses less digits than its factorization.

20356164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188496 (or 188488 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 20356164 is about 4511.7805797711. The cubic root of 20356164 is about 273.0435868095.

The spelling of 20356164 in words is "twenty million, three hundred fifty-six thousand, one hundred sixty-four".