20752957 has 2 divisors, whose sum is σ = 20752958. Its totient is φ = 20752956.

The previous prime is 20752939. The next prime is 20752973. The reversal of 20752957 is 75925702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15319396 + 5433561 = 3914^2 + 2331^2 .

It is a cyclic number.

It is not a de Polignac number, because 20752957 - 2⁷ = 20752829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20752057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10376478 + 10376479.

It is an arithmetic number, because the mean of its divisors is an integer number (10376479).

Almost surely, 2^20752957 is an apocalyptic number.

It is an amenable number.

20752957 is a deficient number, since it is larger than the sum of its proper divisors (1).

20752957 is an equidigital number, since it uses as much as digits as its factorization.

20752957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 44100, while the sum is 37.

The square root of 20752957 is about 4555.5413509264. The cubic root of 20752957 is about 274.8062856151.

The spelling of 20752957 in words is "twenty million, seven hundred fifty-two thousand, nine hundred fifty-seven".