20750164 has 12 divisors (see below), whose sum is σ = 36443988. Its totient is φ = 10337600.

The previous prime is 20750161. The next prime is 20750173. The reversal of 20750164 is 46105702.

It can be written as a sum of positive squares in 2 ways, for example, as 6461764 + 14288400 = 2542^2 + 3780^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20750161) 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, 8107 + ... + 10354.

It is an arithmetic number, because the mean of its divisors is an integer number (3036999).

Almost surely, 2^20750164 is an apocalyptic number.

It is an amenable number.

20750164 is a deficient number, since it is larger than the sum of its proper divisors (15693824).

20750164 is a wasteful number, since it uses less digits than its factorization.

20750164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18746 (or 18744 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 20750164 is about 4555.2347908752. The cubic root of 20750164 is about 274.7939569561.

Adding to 20750164 its reverse (46105702), we get a palindrome (66855866).

The spelling of 20750164 in words is "twenty million, seven hundred fifty thousand, one hundred sixty-four".