20846674543 has 16 divisors (see below), whose sum is σ = 22348569600. Its totient is φ = 19386557280.

The previous prime is 20846674523. The next prime is 20846674559. The reversal of 20846674543 is 34547664802.

It is a de Polignac number, because none of the positive numbers 2^k-20846674543 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 (20846674523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 565098 + ... + 600856.

It is an arithmetic number, because the mean of its divisors is an integer number (1396785600).

Almost surely, 2^20846674543 is an apocalyptic number.

20846674543 is a deficient number, since it is larger than the sum of its proper divisors (1501895057).

20846674543 is a wasteful number, since it uses less digits than its factorization.

20846674543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36342.

The product of its (nonzero) digits is 3870720, while the sum is 49.

The spelling of 20846674543 in words is "twenty billion, eight hundred forty-six million, six hundred seventy-four thousand, five hundred forty-three".