20764529 has 2 divisors, whose sum is σ = 20764530. Its totient is φ = 20764528.

The previous prime is 20764507. The next prime is 20764543. The reversal of 20764529 is 92546702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20205025 + 559504 = 4495^2 + 748^2 .

It is a cyclic number.

It is not a de Polignac number, because 20764529 - 2²⁰ = 19715953 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20764229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10382264 + 10382265.

It is an arithmetic number, because the mean of its divisors is an integer number (10382265).

Almost surely, 2^20764529 is an apocalyptic number.

It is an amenable number.

20764529 is a deficient number, since it is larger than the sum of its proper divisors (1).

20764529 is an equidigital number, since it uses as much as digits as its factorization.

20764529 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 20764529 is about 4556.8112754425. The cubic root of 20764529 is about 274.8573541198.

The spelling of 20764529 in words is "twenty million, seven hundred sixty-four thousand, five hundred twenty-nine".