31402334420 has 24 divisors (see below), whose sum is σ = 65996116200. Its totient is φ = 12551178752.

The previous prime is 31402334377. The next prime is 31402334437. The reversal of 31402334420 is 2443320413.

It can be written as a sum of positive squares in 4 ways, for example, as 5831765956 + 25570568464 = 76366^2 + 159908^2 .

It is a super-2 number, since 2×31402334420² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31402334420.

It is a congruent number.

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, 583265 + ... + 634824.

It is an arithmetic number, because the mean of its divisors is an integer number (2749838175).

Almost surely, 2^31402334420 is an apocalyptic number.

It is an amenable number.

31402334420 is an abundant number, since it is smaller than the sum of its proper divisors (34593781780).

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

31402334420 is a wasteful number, since it uses less digits than its factorization.

31402334420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1219387 (or 1219385 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 31402334420 its reverse (2443320413), we get a palindrome (33845654833).

The spelling of 31402334420 in words is "thirty-one billion, four hundred two million, three hundred thirty-four thousand, four hundred twenty".