20742086943 has 24 divisors (see below), whose sum is σ = 30543671808. Its totient is φ = 13559337792.

The previous prime is 20742086927. The next prime is 20742086951. The reversal of 20742086943 is 34968024702.

It is not a de Polignac number, because 20742086943 - 2⁴ = 20742086927 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20742086983) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 883746 + ... + 906912.

It is an arithmetic number, because the mean of its divisors is an integer number (1272652992).

Almost surely, 2^20742086943 is an apocalyptic number.

20742086943 is a deficient number, since it is larger than the sum of its proper divisors (9801584865).

20742086943 is a wasteful number, since it uses less digits than its factorization.

20742086943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25103 (or 25100 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 45.

The spelling of 20742086943 in words is "twenty billion, seven hundred forty-two million, eighty-six thousand, nine hundred forty-three".