31002024420 has 72 divisors (see below), whose sum is σ = 94662335040. Its totient is φ = 8212449600.

The previous prime is 31002024407. The next prime is 31002024439. The reversal of 31002024420 is 2442020013.

It is a super-2 number, since 2×31002024420² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 31002024393 and 31002024402.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 543130 + ... + 597489.

Almost surely, 2^31002024420 is an apocalyptic number.

31002024420 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31002024420 is an abundant number, since it is smaller than the sum of its proper divisors (63660310620).

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

31002024420 is a wasteful number, since it uses less digits than its factorization.

31002024420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1140785 (or 1140780 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 31002024420 its reverse (2442020013), we get a palindrome (33444044433).

The spelling of 31002024420 in words is "thirty-one billion, two million, twenty-four thousand, four hundred twenty".