20916877543 has 16 divisors (see below), whose sum is σ = 21398135616. Its totient is φ = 20442562560.

The previous prime is 20916877523. The next prime is 20916877573. The reversal of 20916877543 is 34577861902.

It is a cyclic number.

It is not a de Polignac number, because 20916877543 - 2⁹ = 20916877031 is a prime.

It is a super-2 number, since 2×20916877543² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20916877523) 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, 2801271 + ... + 2808727.

It is an arithmetic number, because the mean of its divisors is an integer number (1337383476).

It is a 1-persistent number, because it is pandigital, but 2⋅20916877543 = 41833755086 is not.

Almost surely, 2^20916877543 is an apocalyptic number.

20916877543 is a deficient number, since it is larger than the sum of its proper divisors (481258073).

20916877543 is a wasteful number, since it uses less digits than its factorization.

20916877543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7914.

The product of its (nonzero) digits is 2540160, while the sum is 52.

The spelling of 20916877543 in words is "twenty billion, nine hundred sixteen million, eight hundred seventy-seven thousand, five hundred forty-three".