18990931039 has 8 divisors (see below), whose sum is σ = 19647612000. Its totient is φ = 18334371552.

The previous prime is 18990931027. The next prime is 18990931109. The reversal of 18990931039 is 93013909981.

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

It is a cyclic number.

It is not a de Polignac number, because 18990931039 - 2¹⁹ = 18990406751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18990937039) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 383502 + ... + 430180.

It is an arithmetic number, because the mean of its divisors is an integer number (2455951500).

Almost surely, 2^18990931039 is an apocalyptic number.

18990931039 is a deficient number, since it is larger than the sum of its proper divisors (656680961).

18990931039 is a wasteful number, since it uses less digits than its factorization.

18990931039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60737.

The product of its (nonzero) digits is 472392, while the sum is 52.

The spelling of 18990931039 in words is "eighteen billion, nine hundred ninety million, nine hundred thirty-one thousand, thirty-nine".