20312102320 has 20 divisors (see below), whose sum is σ = 47225638080. Its totient is φ = 8124840896.

The previous prime is 20312102287. The next prime is 20312102353. The reversal of 20312102320 is 2320121302.

It is an interprime number because it is at equal distance from previous prime (20312102287) and next prime (20312102353).

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

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 20312102294 and 20312102303.

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, 126950560 + ... + 126950719.

It is an arithmetic number, because the mean of its divisors is an integer number (2361281904).

Almost surely, 2^20312102320 is an apocalyptic number.

20312102320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20312102320 is an abundant number, since it is smaller than the sum of its proper divisors (26913535760).

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

20312102320 is a wasteful number, since it uses less digits than its factorization.

20312102320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253901292 (or 253901286 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 20312102320 its reverse (2320121302), we get a palindrome (22632223622).

The spelling of 20312102320 in words is "twenty billion, three hundred twelve million, one hundred two thousand, three hundred twenty".