20359117137 has 4 divisors (see below), whose sum is σ = 27145489520. Its totient is φ = 13572744756.

The previous prime is 20359117087. The next prime is 20359117147. The reversal of 20359117137 is 73171195302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-20359117137 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20359117095 and 20359117104.

It is not an unprimeable number, because it can be changed into a prime (20359117147) 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, 3393186187 + ... + 3393186192.

It is an arithmetic number, because the mean of its divisors is an integer number (6786372380).

Almost surely, 2^20359117137 is an apocalyptic number.

It is an amenable number.

20359117137 is a deficient number, since it is larger than the sum of its proper divisors (6786372383).

20359117137 is an equidigital number, since it uses as much as digits as its factorization.

20359117137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6786372382.

The product of its (nonzero) digits is 39690, while the sum is 39.

The spelling of 20359117137 in words is "twenty billion, three hundred fifty-nine million, one hundred seventeen thousand, one hundred thirty-seven".