20634715746143 has 4 divisors (see below), whose sum is σ = 20716925769288. Its totient is φ = 20552505723000.

The previous prime is 20634715746119. The next prime is 20634715746181. The reversal of 20634715746143 is 34164751743602.

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 20634715746143 - 2³⁸ = 20359837839199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20634715746103) 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, 41105011196 + ... + 41105011697.

It is an arithmetic number, because the mean of its divisors is an integer number (5179231442322).

Almost surely, 2^{20634715746143} is an apocalyptic number.

20634715746143 is a deficient number, since it is larger than the sum of its proper divisors (82210023145).

20634715746143 is an equidigital number, since it uses as much as digits as its factorization.

20634715746143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82210023144.

The product of its (nonzero) digits is 10160640, while the sum is 53.

The spelling of 20634715746143 in words is "twenty trillion, six hundred thirty-four billion, seven hundred fifteen million, seven hundred forty-six thousand, one hundred forty-three".