18872704040 has 32 divisors (see below), whose sum is σ = 42839378280. Its totient is φ = 7482273792.

The previous prime is 18872704021. The next prime is 18872704049. The reversal of 18872704040 is 4040727881.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 12164766436 + 6707937604 = 110294^2 + 81902^2 .

It is not an unprimeable number, because it can be changed into a prime (18872704049) 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, 2083169 + ... + 2092208.

Almost surely, 2^18872704040 is an apocalyptic number.

18872704040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18872704040 is an abundant number, since it is smaller than the sum of its proper divisors (23966674240).

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

18872704040 is a wasteful number, since it uses less digits than its factorization.

18872704040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4175501 (or 4175497 counting only the distinct ones).

The product of its (nonzero) digits is 100352, while the sum is 41.

The spelling of 18872704040 in words is "eighteen billion, eight hundred seventy-two million, seven hundred four thousand, forty".