31067479920 has 80 divisors (see below), whose sum is σ = 96532964352. Its totient is φ = 8265411840.

The previous prime is 31067479813. The next prime is 31067479939. The reversal of 31067479920 is 2997476013.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 31067479920.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46732 + ... + 253611.

Almost surely, 2^31067479920 is an apocalyptic number.

31067479920 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31067479920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48266482176).

31067479920 is an abundant number, since it is smaller than the sum of its proper divisors (65465484432).

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

31067479920 is a wasteful number, since it uses less digits than its factorization.

31067479920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300790 (or 300784 counting only the distinct ones).

The product of its (nonzero) digits is 571536, while the sum is 48.

The spelling of 31067479920 in words is "thirty-one billion, sixty-seven million, four hundred seventy-nine thousand, nine hundred twenty".