20952751 has 2 divisors, whose sum is σ = 20952752. Its totient is φ = 20952750.

The previous prime is 20952731. The next prime is 20952773. The reversal of 20952751 is 15725902.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20952751 - 2⁵ = 20952719 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20952731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10476375 + 10476376.

It is an arithmetic number, because the mean of its divisors is an integer number (10476376).

Almost surely, 2^20952751 is an apocalyptic number.

20952751 is a deficient number, since it is larger than the sum of its proper divisors (1).

20952751 is an equidigital number, since it uses as much as digits as its factorization.

20952751 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6300, while the sum is 31.

The square root of 20952751 is about 4577.4175033527. The cubic root of 20952751 is about 275.6853473269.

The spelling of 20952751 in words is "twenty million, nine hundred fifty-two thousand, seven hundred fifty-one".