21823740918072 has 48 divisors (see below), whose sum is σ = 59658357203640. Its totient is φ = 7206593571648.

The previous prime is 21823740918047. The next prime is 21823740918163. The reversal of 21823740918072 is 27081904732812.

21823740918072 is a `hidden beast` number, since 2 + 182 + 374 + 0 + 91 + 8 + 0 + 7 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1416382543 + ... + 1416397950.

Almost surely, 2^{21823740918072} is an apocalyptic number.

It is an amenable number.

21823740918072 is an abundant number, since it is smaller than the sum of its proper divisors (37834616285568).

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

21823740918072 is a wasteful number, since it uses less digits than its factorization.

21823740918072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2832780612 (or 2832780605 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 54.

The spelling of 21823740918072 in words is "twenty-one trillion, eight hundred twenty-three billion, seven hundred forty million, nine hundred eighteen thousand, seventy-two".