20764513 has 16 divisors (see below), whose sum is σ = 26726400. Its totient is φ = 15656400.

The previous prime is 20764507. The next prime is 20764529. The reversal of 20764513 is 31546702.

It is a cyclic number.

It is not a de Polignac number, because 20764513 - 2¹³ = 20756321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20764543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1963 + ... + 6736.

It is an arithmetic number, because the mean of its divisors is an integer number (1670400).

Almost surely, 2^20764513 is an apocalyptic number.

It is an amenable number.

20764513 is a deficient number, since it is larger than the sum of its proper divisors (5961887).

20764513 is a wasteful number, since it uses less digits than its factorization.

20764513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8748.

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

The square root of 20764513 is about 4556.8095198285. The cubic root of 20764513 is about 274.8572835231.

The spelling of 20764513 in words is "twenty million, seven hundred sixty-four thousand, five hundred thirteen".