18426434880 has 112 divisors (see below), whose sum is σ = 66861659520. Its totient is φ = 4211755008.

The previous prime is 18426434779. The next prime is 18426434891. The reversal of 18426434880 is 8843462481.

It is a tau number, because it is divible by the number of its divisors (112).

It is a super-2 number, since 2×18426434880² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1364295 + ... + 1377734.

Almost surely, 2^18426434880 is an apocalyptic number.

18426434880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18426434880 is an abundant number, since it is smaller than the sum of its proper divisors (48435224640).

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

18426434880 is a wasteful number, since it uses less digits than its factorization.

18426434880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2742056 (or 2742046 counting only the distinct ones).

The product of its (nonzero) digits is 1179648, while the sum is 48.

The spelling of 18426434880 in words is "eighteen billion, four hundred twenty-six million, four hundred thirty-four thousand, eight hundred eighty".