22015993123 has 8 divisors (see below), whose sum is σ = 23391717840. Its totient is φ = 20720930080.

The previous prime is 22015993121. The next prime is 22015993127. The reversal of 22015993123 is 32139951022.

It is a happy number.

It is not a de Polignac number, because 22015993123 - 2¹ = 22015993121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22015993121) 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, 2235673 + ... + 2245498.

It is an arithmetic number, because the mean of its divisors is an integer number (2923964730).

Almost surely, 2^22015993123 is an apocalyptic number.

22015993123 is a deficient number, since it is larger than the sum of its proper divisors (1375724717).

22015993123 is an frugal number, since it uses more digits than its factorization.

22015993123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4481222 (or 4481188 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 37.

The spelling of 22015993123 in words is "twenty-two billion, fifteen million, nine hundred ninety-three thousand, one hundred twenty-three".