20164357 has 2 divisors, whose sum is σ = 20164358. Its totient is φ = 20164356.

The previous prime is 20164349. The next prime is 20164373. The reversal of 20164357 is 75346102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15610401 + 4553956 = 3951^2 + 2134^2 .

It is a cyclic number.

It is not a de Polignac number, because 20164357 - 2³ = 20164349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20114357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10082178 + 10082179.

It is an arithmetic number, because the mean of its divisors is an integer number (10082179).

Almost surely, 2^20164357 is an apocalyptic number.

It is an amenable number.

20164357 is a deficient number, since it is larger than the sum of its proper divisors (1).

20164357 is an equidigital number, since it uses as much as digits as its factorization.

20164357 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 20164357 is about 4490.4740284295. The cubic root of 20164357 is about 272.1832899913.

The spelling of 20164357 in words is "twenty million, one hundred sixty-four thousand, three hundred fifty-seven".