31812466421813 has 32 divisors (see below), whose sum is σ = 39707675504640. Its totient is φ = 24760580592960.

The previous prime is 31812466421773. The next prime is 31812466421821.

It is a happy number.

31812466421813 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 31812466421813 - 2³⁴ = 31795286552629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31812466421863) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 538462031 + ... + 538521107.

It is an arithmetic number, because the mean of its divisors is an integer number (1240864859520).

Almost surely, 2^{31812466421813} is an apocalyptic number.

It is an amenable number.

31812466421813 is a deficient number, since it is larger than the sum of its proper divisors (7895209082827).

31812466421813 is a wasteful number, since it uses less digits than its factorization.

31812466421813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66977.

The product of its digits is 1327104, while the sum is 50.

The spelling of 31812466421813 in words is "thirty-one trillion, eight hundred twelve billion, four hundred sixty-six million, four hundred twenty-one thousand, eight hundred thirteen".