18990001001 has 8 divisors (see below), whose sum is σ = 19071269184. Its totient is φ = 18908802000.

The previous prime is 18990000983. The next prime is 18990001039. The reversal of 18990001001 is 10010009981.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18990001001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18990001081) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 575975 + ... + 608051.

It is an arithmetic number, because the mean of its divisors is an integer number (2383908648).

Almost surely, 2^18990001001 is an apocalyptic number.

It is an amenable number.

18990001001 is a deficient number, since it is larger than the sum of its proper divisors (81268183).

18990001001 is a wasteful number, since it uses less digits than its factorization.

18990001001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34591.

The product of its (nonzero) digits is 648, while the sum is 29.

The spelling of 18990001001 in words is "eighteen billion, nine hundred ninety million, one thousand, one".