20764331 has 8 divisors (see below), whose sum is σ = 24762624. Its totient is φ = 17024040.

The previous prime is 20764307. The next prime is 20764351. The reversal of 20764331 is 13346702.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20764331 is a prime.

It is a super-2 number, since 2×20764331² = 862314883755122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20764331.

It is not an unprimeable number, because it can be changed into a prime (20764301) 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, 64325 + ... + 64646.

It is an arithmetic number, because the mean of its divisors is an integer number (3095328).

Almost surely, 2^20764331 is an apocalyptic number.

20764331 is a deficient number, since it is larger than the sum of its proper divisors (3998293).

20764331 is a wasteful number, since it uses less digits than its factorization.

20764331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129001.

The product of its (nonzero) digits is 3024, while the sum is 26.

The square root of 20764331 is about 4556.7895496720. The cubic root of 20764331 is about 274.8564804837.

The spelling of 20764331 in words is "twenty million, seven hundred sixty-four thousand, three hundred thirty-one".