21885723175755 has 24 divisors (see below), whose sum is σ = 36957165792912. Its totient is φ = 11058049601856.

The previous prime is 21885723175751. The next prime is 21885723175769. The reversal of 21885723175755 is 55757132758812.

It is not a de Polignac number, because 21885723175755 - 2² = 21885723175751 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21885723175751) 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, 2020836984 + ... + 2020847813.

It is an arithmetic number, because the mean of its divisors is an integer number (1539881908038).

Almost surely, 2^{21885723175755} is an apocalyptic number.

21885723175755 is a deficient number, since it is larger than the sum of its proper divisors (15071442617157).

21885723175755 is a wasteful number, since it uses less digits than its factorization.

21885723175755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4041684843 (or 4041684824 counting only the distinct ones).

The product of its digits is 164640000, while the sum is 66.

The spelling of 21885723175755 in words is "twenty-one trillion, eight hundred eighty-five billion, seven hundred twenty-three million, one hundred seventy-five thousand, seven hundred fifty-five".