18500415490 has 8 divisors (see below), whose sum is σ = 33300747900. Its totient is φ = 7400166192.

The previous prime is 18500415487. The next prime is 18500415499. The reversal of 18500415490 is 9451400581.

It can be written as a sum of positive squares in 2 ways, for example, as 16847261209 + 1653154281 = 129797^2 + 40659^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (18500415499) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 925020765 + ... + 925020784.

Almost surely, 2^18500415490 is an apocalyptic number.

18500415490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18500415490 is a deficient number, since it is larger than the sum of its proper divisors (14800332410).

18500415490 is a wasteful number, since it uses less digits than its factorization.

18500415490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1850041556.

The product of its (nonzero) digits is 28800, while the sum is 37.

The spelling of 18500415490 in words is "eighteen billion, five hundred million, four hundred fifteen thousand, four hundred ninety".