31673399472 has 180 divisors, whose sum is σ = 104927975152. Its totient is φ = 8859628800.

The previous prime is 31673399467. The next prime is 31673399473. The reversal of 31673399472 is 27499337613.

31673399472 is a `hidden beast` number, since 3 + 16 + 73 + 3 + 99 + 472 = 666.

It is a super-2 number, since 2×31673399472² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31673399473) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 156597 + ... + 296427.

Almost surely, 2^31673399472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31673399472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52463987576).

31673399472 is an abundant number, since it is smaller than the sum of its proper divisors (73254575680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31673399472 is a wasteful number, since it uses less digits than its factorization.

31673399472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139880 (or 139860 counting only the distinct ones).

The product of its digits is 5143824, while the sum is 54.

The spelling of 31673399472 in words is "thirty-one billion, six hundred seventy-three million, three hundred ninety-nine thousand, four hundred seventy-two".