22018352678644 has 24 divisors (see below), whose sum is σ = 44693969620160. Its totient is φ = 9295594520256.

The previous prime is 22018352678603. The next prime is 22018352678677. The reversal of 22018352678644 is 44687625381022.

It is a super-2 number, since 2×22018352678644² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5868429009 + ... + 5868432760.

Almost surely, 2^{22018352678644} is an apocalyptic number.

It is an amenable number.

22018352678644 is an abundant number, since it is smaller than the sum of its proper divisors (22675616941516).

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

22018352678644 is a wasteful number, since it uses less digits than its factorization.

22018352678644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11736861847 (or 11736861845 counting only the distinct ones).

The product of its (nonzero) digits is 30965760, while the sum is 58.

The spelling of 22018352678644 in words is "twenty-two trillion, eighteen billion, three hundred fifty-two million, six hundred seventy-eight thousand, six hundred forty-four".