20013657265739 has 4 divisors (see below), whose sum is σ = 20014318707720. Its totient is φ = 20012995823760.

The previous prime is 20013657265709. The next prime is 20013657265751. The reversal of 20013657265739 is 93756275631002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20013657265739 - 2¹² = 20013657261643 is a prime.

It is a super-2 number, since 2×20013657265739² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20013657265709) 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, 330675602 + ... + 330736119.

It is an arithmetic number, because the mean of its divisors is an integer number (5003579676930).

Almost surely, 2^{20013657265739} is an apocalyptic number.

20013657265739 is a deficient number, since it is larger than the sum of its proper divisors (661441981).

20013657265739 is an equidigital number, since it uses as much as digits as its factorization.

20013657265739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661441980.

The product of its (nonzero) digits is 14288400, while the sum is 56.

The spelling of 20013657265739 in words is "twenty trillion, thirteen billion, six hundred fifty-seven million, two hundred sixty-five thousand, seven hundred thirty-nine".