31949231918011 has 2 divisors, whose sum is σ = 31949231918012. Its totient is φ = 31949231918010.

The previous prime is 31949231917997. The next prime is 31949231918027. The reversal of 31949231918011 is 11081913294913.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31949231918011 - 2²³ = 31949223529403 is a prime.

It is a super-2 number, since 2×31949231918011² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31949231918011.

It is not a weakly prime, because it can be changed into another prime (31949231918081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15974615959005 + 15974615959006.

It is an arithmetic number, because the mean of its divisors is an integer number (15974615959006).

Almost surely, 2^{31949231918011} is an apocalyptic number.

31949231918011 is a deficient number, since it is larger than the sum of its proper divisors (1).

31949231918011 is an equidigital number, since it uses as much as digits as its factorization.

31949231918011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 419904, while the sum is 52.

The spelling of 31949231918011 in words is "thirty-one trillion, nine hundred forty-nine billion, two hundred thirty-one million, nine hundred eighteen thousand, eleven".