31204214320 has 20 divisors (see below), whose sum is σ = 72549798480. Its totient is φ = 12481685696.

The previous prime is 31204214299. The next prime is 31204214369. The reversal of 31204214320 is 2341240213.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 31204214291 and 31204214300.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 195026260 + ... + 195026419.

It is an arithmetic number, because the mean of its divisors is an integer number (3627489924).

Almost surely, 2^31204214320 is an apocalyptic number.

It is an amenable number.

31204214320 is an abundant number, since it is smaller than the sum of its proper divisors (41345584160).

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

31204214320 is a wasteful number, since it uses less digits than its factorization.

31204214320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390052692 (or 390052686 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 31204214320 its reverse (2341240213), we get a palindrome (33545454533).

The spelling of 31204214320 in words is "thirty-one billion, two hundred four million, two hundred fourteen thousand, three hundred twenty".