20312321310 has 96 divisors (see below), whose sum is σ = 56203310592. Its totient is φ = 5072040960.

The previous prime is 20312321287. The next prime is 20312321371. The reversal of 20312321310 is 1312321302.

20312321310 is a `hidden beast` number, since 2 + 0 + 31 + 2 + 321 + 310 = 666.

It is a super-2 number, since 2×20312321310² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 267715 + ... + 335105.

It is an arithmetic number, because the mean of its divisors is an integer number (585451152).

Almost surely, 2^20312321310 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20312321310, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28101655296).

20312321310 is an abundant number, since it is smaller than the sum of its proper divisors (35890989282).

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

20312321310 is a wasteful number, since it uses less digits than its factorization.

20312321310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67618 (or 67615 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 20312321310 its reverse (1312321302), we get a palindrome (21624642612).

The spelling of 20312321310 in words is "twenty billion, three hundred twelve million, three hundred twenty-one thousand, three hundred ten".