18990931030 has 32 divisors (see below), whose sum is σ = 36479517696. Its totient is φ = 7093223424.

The previous prime is 18990931027. The next prime is 18990931109. The reversal of 18990931030 is 3013909981.

It is a super-2 number, since 2×18990931030² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 418219 + ... + 461398.

It is an arithmetic number, because the mean of its divisors is an integer number (1139984928).

Almost surely, 2^18990931030 is an apocalyptic number.

18990931030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18990931030 is a deficient number, since it is larger than the sum of its proper divisors (17488586666).

18990931030 is a wasteful number, since it uses less digits than its factorization.

18990931030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 879768.

The product of its (nonzero) digits is 52488, while the sum is 43.

The spelling of 18990931030 in words is "eighteen billion, nine hundred ninety million, nine hundred thirty-one thousand, thirty".