31345120740 has 48 divisors (see below), whose sum is σ = 89906987520. Its totient is φ = 8154827520.

The previous prime is 31345120711. The next prime is 31345120753. The reversal of 31345120740 is 4702154313.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 31345120698 and 31345120707.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6368500 + ... + 6373419.

It is an arithmetic number, because the mean of its divisors is an integer number (1873062240).

Almost surely, 2^31345120740 is an apocalyptic number.

31345120740 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31345120740 is an abundant number, since it is smaller than the sum of its proper divisors (58561866780).

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

31345120740 is a wasteful number, since it uses less digits than its factorization.

31345120740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12741972 (or 12741970 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 30.

The spelling of 31345120740 in words is "thirty-one billion, three hundred forty-five million, one hundred twenty thousand, seven hundred forty".