20764507 has 2 divisors, whose sum is σ = 20764508. Its totient is φ = 20764506.

The previous prime is 20764487. The next prime is 20764529. The reversal of 20764507 is 70546702.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20764507 - 2¹⁹ = 20240219 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20764547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10382253 + 10382254.

It is an arithmetic number, because the mean of its divisors is an integer number (10382254).

Almost surely, 2^20764507 is an apocalyptic number.

20764507 is a deficient number, since it is larger than the sum of its proper divisors (1).

20764507 is an equidigital number, since it uses as much as digits as its factorization.

20764507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11760, while the sum is 31.

The square root of 20764507 is about 4556.8088614731. The cubic root of 20764507 is about 274.8572570494.

The spelling of 20764507 in words is "twenty million, seven hundred sixty-four thousand, five hundred seven".