19800401013 has 12 divisors (see below), whose sum is σ = 28668843840. Its totient is φ = 13168760616.

The previous prime is 19800400979. The next prime is 19800401029. The reversal of 19800401013 is 31010400891.

It is not a de Polignac number, because 19800401013 - 2¹⁰ = 19800399989 is a prime.

It is a super-2 number, since 2×19800401013² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19800401513) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2621581 + ... + 2629122.

It is an arithmetic number, because the mean of its divisors is an integer number (2389070320).

Almost surely, 2^19800401013 is an apocalyptic number.

It is an amenable number.

19800401013 is a deficient number, since it is larger than the sum of its proper divisors (8868442827).

19800401013 is a wasteful number, since it uses less digits than its factorization.

19800401013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5251128 (or 5251125 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The spelling of 19800401013 in words is "nineteen billion, eight hundred million, four hundred one thousand, thirteen".