20135737402563 has 4 divisors (see below), whose sum is σ = 26847649870088. Its totient is φ = 13423824935040.

The previous prime is 20135737402483. The next prime is 20135737402589. The reversal of 20135737402563 is 36520473753102.

It is a happy number.

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

It is not a de Polignac number, because 20135737402563 - 2²⁵ = 20135703848131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20130737402563) 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, 3355956233758 + ... + 3355956233763.

It is an arithmetic number, because the mean of its divisors is an integer number (6711912467522).

Almost surely, 2^{20135737402563} is an apocalyptic number.

20135737402563 is a deficient number, since it is larger than the sum of its proper divisors (6711912467525).

20135737402563 is an equidigital number, since it uses as much as digits as its factorization.

20135737402563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6711912467524.

The product of its (nonzero) digits is 3175200, while the sum is 48.

The spelling of 20135737402563 in words is "twenty trillion, one hundred thirty-five billion, seven hundred thirty-seven million, four hundred two thousand, five hundred sixty-three".