15990018404 has 24 divisors (see below), whose sum is σ = 29858804640. Its totient is φ = 7470460224.

The previous prime is 15990018353. The next prime is 15990018413. The reversal of 15990018404 is 40481009951.

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, 1435514 + ... + 1446609.

It is an arithmetic number, because the mean of its divisors is an integer number (1244116860).

Almost surely, 2^15990018404 is an apocalyptic number.

It is an amenable number.

15990018404 is a deficient number, since it is larger than the sum of its proper divisors (13868786236).

15990018404 is a wasteful number, since it uses less digits than its factorization.

15990018404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2882219 (or 2882217 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 41.

The spelling of 15990018404 in words is "fifteen billion, nine hundred ninety million, eighteen thousand, four hundred four".