31323421034020 has 24 divisors (see below), whose sum is σ = 65779620690168. Its totient is φ = 12529285267200.

The previous prime is 31323421033963. The next prime is 31323421034027. The reversal of 31323421034020 is 2043012432313.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 22938122469376 + 8385298564644 = 4789376^2 + 2895738^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 31323421034020.

It is not an unprimeable number, because it can be changed into a prime (31323421034027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2061361 + ... + 8179000.

It is an arithmetic number, because the mean of its divisors is an integer number (2740817528757).

Almost surely, 2^{31323421034020} is an apocalyptic number.

It is an amenable number.

31323421034020 is an abundant number, since it is smaller than the sum of its proper divisors (34456199656148).

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

31323421034020 is a wasteful number, since it uses less digits than its factorization.

31323421034020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10393311 (or 10393309 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 28.

Adding to 31323421034020 its reverse (2043012432313), we get a palindrome (33366433466333).

The spelling of 31323421034020 in words is "thirty-one trillion, three hundred twenty-three billion, four hundred twenty-one million, thirty-four thousand, twenty".