18838577744 has 40 divisors (see below), whose sum is σ = 44167762368. Its totient is φ = 7598753280.

The previous prime is 18838577717. The next prime is 18838577759. The reversal of 18838577744 is 44777583881.

It is a super-2 number, since 2×18838577744² (a number of 21 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, 4945202 + ... + 4949009.

Almost surely, 2^18838577744 is an apocalyptic number.

18838577744 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18838577744 is an abundant number, since it is smaller than the sum of its proper divisors (25329184624).

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

18838577744 is a wasteful number, since it uses less digits than its factorization.

18838577744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9894243 (or 9894237 counting only the distinct ones).

The product of its digits is 42147840, while the sum is 62.

The spelling of 18838577744 in words is "eighteen billion, eight hundred thirty-eight million, five hundred seventy-seven thousand, seven hundred forty-four".