19901002200 has 48 divisors (see below), whose sum is σ = 61693108680. Its totient is φ = 5306933760.

The previous prime is 19901002127. The next prime is 19901002201. The reversal of 19901002200 is 220010991.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19901002201) 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, 16583569 + ... + 16584768.

Almost surely, 2^19901002200 is an apocalyptic number.

19901002200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19901002200 is an abundant number, since it is smaller than the sum of its proper divisors (41792106480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19901002200 is a wasteful number, since it uses less digits than its factorization.

19901002200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33168356 (or 33168347 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 24.

The spelling of 19901002200 in words is "nineteen billion, nine hundred one million, two thousand, two hundred".