22398015918 has 8 divisors (see below), whose sum is σ = 44796031848. Its totient is φ = 7466005304.

The previous prime is 22398015907. The next prime is 22398015919. The reversal of 22398015918 is 81951089322.

It is a sphenic number, since it is the product of 3 distinct primes.

22398015918 is an admirable number.

It is a super-2 number, since 2×22398015918² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22398015919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1866501321 + ... + 1866501332.

It is an arithmetic number, because the mean of its divisors is an integer number (5599503981).

Almost surely, 2^22398015918 is an apocalyptic number.

22398015918 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

22398015918 is a wasteful number, since it uses less digits than its factorization.

22398015918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3733002658.

The product of its (nonzero) digits is 311040, while the sum is 48.

The spelling of 22398015918 in words is "twenty-two billion, three hundred ninety-eight million, fifteen thousand, nine hundred eighteen".