31904636213 has 8 divisors (see below), whose sum is σ = 31985238528. Its totient is φ = 31824136624.

The previous prime is 31904636149. The next prime is 31904636263. The reversal of 31904636213 is 31263640913.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31904636213 - 2⁶ = 31904636149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31904636263) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 616331 + ... + 666087.

It is an arithmetic number, because the mean of its divisors is an integer number (3998154816).

Almost surely, 2^31904636213 is an apocalyptic number.

It is an amenable number.

31904636213 is a deficient number, since it is larger than the sum of its proper divisors (80602315).

31904636213 is an equidigital number, since it uses as much as digits as its factorization.

31904636213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51363.

The product of its (nonzero) digits is 69984, while the sum is 38.

The spelling of 31904636213 in words is "thirty-one billion, nine hundred four million, six hundred thirty-six thousand, two hundred thirteen".