18219158990 has 16 divisors (see below), whose sum is σ = 32906418048. Its totient is φ = 7262789856.

The previous prime is 18219158987. The next prime is 18219159083. The reversal of 18219158990 is 9985191281.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3106142 + ... + 3112001.

It is an arithmetic number, because the mean of its divisors is an integer number (2056651128).

Almost surely, 2^18219158990 is an apocalyptic number.

18219158990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18219158990 is a deficient number, since it is larger than the sum of its proper divisors (14687259058).

18219158990 is a wasteful number, since it uses less digits than its factorization.

18219158990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6218443.

The product of its (nonzero) digits is 466560, while the sum is 53.

The spelling of 18219158990 in words is "eighteen billion, two hundred nineteen million, one hundred fifty-eight thousand, nine hundred ninety".