20812384137 has 8 divisors (see below), whose sum is σ = 27767766400. Its totient is φ = 13865962320.

The previous prime is 20812384123. The next prime is 20812384189. The reversal of 20812384137 is 73148321802.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20812384137 - 2²⁶ = 20745275273 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20812384095 and 20812384104.

It is not an unprimeable number, because it can be changed into a prime (20812382137) 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, 2234689 + ... + 2243982.

It is an arithmetic number, because the mean of its divisors is an integer number (3470970800).

Almost surely, 2^20812384137 is an apocalyptic number.

It is an amenable number.

20812384137 is a deficient number, since it is larger than the sum of its proper divisors (6955382263).

20812384137 is a wasteful number, since it uses less digits than its factorization.

20812384137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4480223.

The product of its (nonzero) digits is 64512, while the sum is 39.

The spelling of 20812384137 in words is "twenty billion, eight hundred twelve million, three hundred eighty-four thousand, one hundred thirty-seven".