20764137 has 8 divisors (see below), whose sum is σ = 27707040. Its totient is φ = 13832000.

The previous prime is 20764127. The next prime is 20764153. The reversal of 20764137 is 73146702.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20764137 - 2⁸ = 20763881 is a prime.

It is a super-2 number, since 2×20764137² = 862298770709538, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20764127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4762 + ... + 8012.

It is an arithmetic number, because the mean of its divisors is an integer number (3463380).

Almost surely, 2^20764137 is an apocalyptic number.

It is an amenable number.

20764137 is a deficient number, since it is larger than the sum of its proper divisors (6942903).

20764137 is a wasteful number, since it uses less digits than its factorization.

20764137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5383.

The product of its (nonzero) digits is 7056, while the sum is 30.

The square root of 20764137 is about 4556.7682627055. The cubic root of 20764137 is about 274.8556244913.

The spelling of 20764137 in words is "twenty million, seven hundred sixty-four thousand, one hundred thirty-seven".