20335957 has 2 divisors, whose sum is σ = 20335958. Its totient is φ = 20335956.

The previous prime is 20335937. The next prime is 20335981. The reversal of 20335957 is 75953302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11329956 + 9006001 = 3366^2 + 3001^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20335957 is a prime.

It is a super-2 number, since 2×20335957² = 827102294211698, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20335937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10167978 + 10167979.

It is an arithmetic number, because the mean of its divisors is an integer number (10167979).

Almost surely, 2^20335957 is an apocalyptic number.

It is an amenable number.

20335957 is a deficient number, since it is larger than the sum of its proper divisors (1).

20335957 is an equidigital number, since it uses as much as digits as its factorization.

20335957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28350, while the sum is 34.

The square root of 20335957 is about 4509.5406639701. The cubic root of 20335957 is about 272.9532092966.

It can be divided in two parts, 2033 and 5957, that multiplied together give a triangular number (12110581 = T₄₉₂₁).

The spelling of 20335957 in words is "twenty million, three hundred thirty-five thousand, nine hundred fifty-seven".