20331010939 has 2 divisors, whose sum is σ = 20331010940. Its totient is φ = 20331010938.

The previous prime is 20331010879. The next prime is 20331010943. The reversal of 20331010939 is 93901013302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20331010939 - 2⁷ = 20331010811 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20331010939.

It is not a weakly prime, because it can be changed into another prime (20331010969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10165505469 + 10165505470.

It is an arithmetic number, because the mean of its divisors is an integer number (10165505470).

Almost surely, 2^20331010939 is an apocalyptic number.

20331010939 is a deficient number, since it is larger than the sum of its proper divisors (1).

20331010939 is an equidigital number, since it uses as much as digits as its factorization.

20331010939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4374, while the sum is 31.

The spelling of 20331010939 in words is "twenty billion, three hundred thirty-one million, ten thousand, nine hundred thirty-nine".