22018338421 has 16 divisors (see below), whose sum is σ = 22939200000. Its totient is φ = 21108779776.

The previous prime is 22018338413. The next prime is 22018338437. The reversal of 22018338421 is 12483381022.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 22018338421 - 2³ = 22018338413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22018338401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2483805 + ... + 2492653.

It is an arithmetic number, because the mean of its divisors is an integer number (1433700000).

Almost surely, 2^22018338421 is an apocalyptic number.

It is an amenable number.

22018338421 is a deficient number, since it is larger than the sum of its proper divisors (920861579).

22018338421 is a wasteful number, since it uses less digits than its factorization.

22018338421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9476.

The product of its (nonzero) digits is 18432, while the sum is 34.

The spelling of 22018338421 in words is "twenty-two billion, eighteen million, three hundred thirty-eight thousand, four hundred twenty-one".