18190424640 has 56 divisors (see below), whose sum is σ = 57754601280. Its totient is φ = 4850779648.

The previous prime is 18190424597. The next prime is 18190424641. The reversal of 18190424640 is 4642409181.

It is a super-3 number, since 3×18190424640³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (18190424641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9473220 + ... + 9475139.

Almost surely, 2^18190424640 is an apocalyptic number.

18190424640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18190424640 is an abundant number, since it is smaller than the sum of its proper divisors (39564176640).

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

18190424640 is a wasteful number, since it uses less digits than its factorization.

18190424640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18948379 (or 18948369 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 39.

The spelling of 18190424640 in words is "eighteen billion, one hundred ninety million, four hundred twenty-four thousand, six hundred forty".