19901002102 has 8 divisors (see below), whose sum is σ = 29854616976. Its totient is φ = 9949463112.

The previous prime is 19901002073. The next prime is 19901002117. The reversal of 19901002102 is 20120010991.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 494778 + ... + 533485.

It is an arithmetic number, because the mean of its divisors is an integer number (3731827122).

Almost surely, 2^19901002102 is an apocalyptic number.

19901002102 is a deficient number, since it is larger than the sum of its proper divisors (9953614874).

19901002102 is a wasteful number, since it uses less digits than its factorization.

19901002102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1037942.

The product of its (nonzero) digits is 324, while the sum is 25.

The spelling of 19901002102 in words is "nineteen billion, nine hundred one million, two thousand, one hundred two".