31103024420 has 24 divisors (see below), whose sum is σ = 70340686584. Its totient is φ = 11484193536.

The previous prime is 31103024413. The next prime is 31103024443. The reversal of 31103024420 is 2442030113.

It can be written as a sum of positive squares in 4 ways, for example, as 4172901604 + 26930122816 = 64598^2 + 164104^2 .

It is a super-2 number, since 2×31103024420² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 31103024392 and 31103024401.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59813249 + ... + 59813768.

It is an arithmetic number, because the mean of its divisors is an integer number (2930861941).

Almost surely, 2^31103024420 is an apocalyptic number.

It is an amenable number.

31103024420 is an abundant number, since it is smaller than the sum of its proper divisors (39237662164).

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

31103024420 is a wasteful number, since it uses less digits than its factorization.

31103024420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119627039 (or 119627037 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 31103024420 its reverse (2442030113), we get a palindrome (33545054533).

The spelling of 31103024420 in words is "thirty-one billion, one hundred three million, twenty-four thousand, four hundred twenty".