20315123011632 has 40 divisors (see below), whose sum is σ = 52482375426880. Its totient is φ = 6771495931200.

The previous prime is 20315123011583. The next prime is 20315123011633. The reversal of 20315123011632 is 23611032151302.

It is a self number, because there is not a number n which added to its sum of digits gives 20315123011632.

It is not an unprimeable number, because it can be changed into a prime (20315123011633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5061994 + ... + 8139657.

It is an arithmetic number, because the mean of its divisors is an integer number (1312059385672).

Almost surely, 2^{20315123011632} is an apocalyptic number.

It is an amenable number.

20315123011632 is an abundant number, since it is smaller than the sum of its proper divisors (32167252415248).

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

20315123011632 is a wasteful number, since it uses less digits than its factorization.

20315123011632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13233721 (or 13233715 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

Adding to 20315123011632 its reverse (23611032151302), we get a palindrome (43926155162934).

The spelling of 20315123011632 in words is "twenty trillion, three hundred fifteen billion, one hundred twenty-three million, eleven thousand, six hundred thirty-two".