21106746054 has 12 divisors (see below), whose sum is σ = 45731283156. Its totient is φ = 7035582012.

The previous prime is 21106746029. The next prime is 21106746097. The reversal of 21106746054 is 45064760112.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 586298484 + ... + 586298519.

It is an arithmetic number, because the mean of its divisors is an integer number (3810940263).

Almost surely, 2^21106746054 is an apocalyptic number.

21106746054 is an abundant number, since it is smaller than the sum of its proper divisors (24624537102).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21106746054 is a wasteful number, since it uses less digits than its factorization.

21106746054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1172597011 (or 1172597008 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The spelling of 21106746054 in words is "twenty-one billion, one hundred six million, seven hundred forty-six thousand, fifty-four".