31671132420 has 48 divisors (see below), whose sum is σ = 88689823488. Its totient is φ = 8444620800.

The previous prime is 31671132397. The next prime is 31671132421. The reversal of 31671132420 is 2423117613.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (31671132421) by changing a digit.

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, 564645 + ... + 618195.

It is an arithmetic number, because the mean of its divisors is an integer number (1847704656).

Almost surely, 2^31671132420 is an apocalyptic number.

31671132420 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31671132420 is an abundant number, since it is smaller than the sum of its proper divisors (57018691068).

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

31671132420 is a wasteful number, since it uses less digits than its factorization.

31671132420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63420 (or 63418 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The spelling of 31671132420 in words is "thirty-one billion, six hundred seventy-one million, one hundred thirty-two thousand, four hundred twenty".