23221857378 has 16 divisors (see below), whose sum is σ = 46894625856. Its totient is φ = 7665467280.

The previous prime is 23221857371. The next prime is 23221857389. The reversal of 23221857378 is 87375812232.

It is not an unprimeable number, because it can be changed into a prime (23221857371) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18787293 + ... + 18788528.

It is an arithmetic number, because the mean of its divisors is an integer number (2930914116).

Almost surely, 2^23221857378 is an apocalyptic number.

23221857378 is an abundant number, since it is smaller than the sum of its proper divisors (23672768478).

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

23221857378 is a wasteful number, since it uses less digits than its factorization.

23221857378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37575929.

The product of its digits is 1128960, while the sum is 48.

The spelling of 23221857378 in words is "twenty-three billion, two hundred twenty-one million, eight hundred fifty-seven thousand, three hundred seventy-eight".