19901002103 has 16 divisors (see below), whose sum is σ = 20971560960. Its totient is φ = 18848289504.

The previous prime is 19901002073. The next prime is 19901002117. The reversal of 19901002103 is 30120010991.

It is not a de Polignac number, because 19901002103 - 2⁶ = 19901002039 is a prime.

It is a super-2 number, since 2×19901002103² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19901002603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1216325 + ... + 1232577.

It is an arithmetic number, because the mean of its divisors is an integer number (1310722560).

Almost surely, 2^19901002103 is an apocalyptic number.

19901002103 is a deficient number, since it is larger than the sum of its proper divisors (1070558857).

19901002103 is a wasteful number, since it uses less digits than its factorization.

19901002103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16798.

The product of its (nonzero) digits is 486, while the sum is 26.

The spelling of 19901002103 in words is "nineteen billion, nine hundred one million, two thousand, one hundred three".