20315710730 has 32 divisors (see below), whose sum is σ = 42198084864. Its totient is φ = 6897758976.

The previous prime is 20315710637. The next prime is 20315710759. The reversal of 20315710730 is 3701751302.

It is a junction number, because it is equal to n+sod(n) for n = 20315710693 and 20315710702.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1401647 + ... + 1416066.

It is an arithmetic number, because the mean of its divisors is an integer number (1318690152).

Almost surely, 2^20315710730 is an apocalyptic number.

20315710730 is an abundant number, since it is smaller than the sum of its proper divisors (21882374134).

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

20315710730 is a wasteful number, since it uses less digits than its factorization.

20315710730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2817830.

The product of its (nonzero) digits is 4410, while the sum is 29.

The spelling of 20315710730 in words is "twenty billion, three hundred fifteen million, seven hundred ten thousand, seven hundred thirty".