20311798460 has 12 divisors (see below), whose sum is σ = 42654776808. Its totient is φ = 8124719376.

The previous prime is 20311798453. The next prime is 20311798469. The reversal of 20311798460 is 6489711302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20311798469) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 507794942 + ... + 507794981.

It is an arithmetic number, because the mean of its divisors is an integer number (3554564734).

Almost surely, 2^20311798460 is an apocalyptic number.

20311798460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20311798460 is an abundant number, since it is smaller than the sum of its proper divisors (22342978348).

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

20311798460 is a wasteful number, since it uses less digits than its factorization.

20311798460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1015589932 (or 1015589930 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 41.

The spelling of 20311798460 in words is "twenty billion, three hundred eleven million, seven hundred ninety-eight thousand, four hundred sixty".