18780087130 has 32 divisors (see below), whose sum is σ = 39098795904. Its totient is φ = 6361308096.

The previous prime is 18780087049. The next prime is 18780087173. The reversal of 18780087130 is 3178008781.

It is a happy number.

It is a super-2 number, since 2×18780087130² (a number of 21 digits) contains 22 as substring.

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, 1610377 + ... + 1621996.

It is an arithmetic number, because the mean of its divisors is an integer number (1221837372).

Almost surely, 2^18780087130 is an apocalyptic number.

18780087130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18780087130 is an abundant number, since it is smaller than the sum of its proper divisors (20318708774).

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

18780087130 is a wasteful number, since it uses less digits than its factorization.

18780087130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3232470.

The product of its (nonzero) digits is 75264, while the sum is 43.

The spelling of 18780087130 in words is "eighteen billion, seven hundred eighty million, eighty-seven thousand, one hundred thirty".