20311312302 has 80 divisors (see below), whose sum is σ = 46273021344. Its totient is φ = 6658200000.

The previous prime is 20311312297. The next prime is 20311312337. The reversal of 20311312302 is 20321311302.

20311312302 is a `hidden beast` number, since 20 + 31 + 1 + 312 + 302 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2466552 + ... + 2474772.

Almost surely, 2^20311312302 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20311312302, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23136510672).

20311312302 is an abundant number, since it is smaller than the sum of its proper divisors (25961709042).

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

20311312302 is a wasteful number, since it uses less digits than its factorization.

20311312302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8487 (or 8478 counting only the distinct ones).

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

Adding to 20311312302 its reverse (20321311302), we get a palindrome (40632623604).

The spelling of 20311312302 in words is "twenty billion, three hundred eleven million, three hundred twelve thousand, three hundred two".