20790164 has 12 divisors (see below), whose sum is σ = 36601824. Its totient is φ = 10332504.

The previous prime is 20790163. The next prime is 20790173. The reversal of 20790164 is 46109702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20790163) 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, 14894 + ... + 16229.

It is an arithmetic number, because the mean of its divisors is an integer number (3050152).

Almost surely, 2^20790164 is an apocalyptic number.

It is an amenable number.

20790164 is a deficient number, since it is larger than the sum of its proper divisors (15811660).

20790164 is a wasteful number, since it uses less digits than its factorization.

20790164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31294 (or 31292 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 20790164 is about 4559.6232300487. The cubic root of 20790164 is about 274.9704166524.

Adding to 20790164 its reverse (46109702), we get a palindrome (66899866).

The spelling of 20790164 in words is "twenty million, seven hundred ninety thousand, one hundred sixty-four".