21920523822 has 24 divisors (see below), whose sum is σ = 47509495176. Its totient is φ = 7304529456.

The previous prime is 21920523803. The next prime is 21920523887. The reversal of 21920523822 is 22832502912.

21920523822 is a `hidden beast` number, since 21 + 92 + 0 + 523 + 8 + 22 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 133693 + ... + 248424.

It is an arithmetic number, because the mean of its divisors is an integer number (1979562299).

Almost surely, 2^21920523822 is an apocalyptic number.

21920523822 is an abundant number, since it is smaller than the sum of its proper divisors (25588971354).

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

21920523822 is a wasteful number, since it uses less digits than its factorization.

21920523822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385312 (or 385309 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The spelling of 21920523822 in words is "twenty-one billion, nine hundred twenty million, five hundred twenty-three thousand, eight hundred twenty-two".