18415250990 has 8 divisors (see below), whose sum is σ = 33147451800. Its totient is φ = 7366100392.

The previous prime is 18415250957. The next prime is 18415251083. The reversal of 18415250990 is 9905251481.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 920762540 + ... + 920762559.

It is an arithmetic number, because the mean of its divisors is an integer number (4143431475).

Almost surely, 2^18415250990 is an apocalyptic number.

18415250990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18415250990 is a deficient number, since it is larger than the sum of its proper divisors (14732200810).

18415250990 is a wasteful number, since it uses less digits than its factorization.

18415250990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1841525106.

The product of its (nonzero) digits is 129600, while the sum is 44.

The spelling of 18415250990 in words is "eighteen billion, four hundred fifteen million, two hundred fifty thousand, nine hundred ninety".