22418493890 has 24 divisors (see below), whose sum is σ = 43696168308. Its totient is φ = 8277597120.

The previous prime is 22418493887. The next prime is 22418493893. The reversal of 22418493890 is 9839481422.

It is an interprime number because it is at equal distance from previous prime (22418493887) and next prime (22418493893).

It can be written as a sum of positive squares in 6 ways, for example, as 378419209 + 22040074681 = 19453^2 + 148459^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22418493893) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6631001 + ... + 6634380.

Almost surely, 2^22418493890 is an apocalyptic number.

22418493890 is a deficient number, since it is larger than the sum of its proper divisors (21277674418).

22418493890 is a wasteful number, since it uses less digits than its factorization.

22418493890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13265414 (or 13265401 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 50.

The spelling of 22418493890 in words is "twenty-two billion, four hundred eighteen million, four hundred ninety-three thousand, eight hundred ninety".