21634546023 has 48 divisors (see below), whose sum is σ = 33348631680. Its totient is φ = 13475927232.

The previous prime is 21634546019. The next prime is 21634546081. The reversal of 21634546023 is 32064543612.

21634546023 is a `hidden beast` number, since 2 + 1 + 6 + 3 + 45 + 4 + 602 + 3 = 666.

It is not a de Polignac number, because 21634546023 - 2² = 21634546019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21634546123) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 12105736 + ... + 12107522.

It is an arithmetic number, because the mean of its divisors is an integer number (694763160).

Almost surely, 2^21634546023 is an apocalyptic number.

21634546023 is a deficient number, since it is larger than the sum of its proper divisors (11714085657).

21634546023 is a wasteful number, since it uses less digits than its factorization.

21634546023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2748 (or 2745 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 36.

The spelling of 21634546023 in words is "twenty-one billion, six hundred thirty-four million, five hundred forty-six thousand, twenty-three".