19902980200 has 24 divisors (see below), whose sum is σ = 46274429430. Its totient is φ = 7961192000.

The previous prime is 19902980179. The next prime is 19902980219. The reversal of 19902980200 is 208920991.

It can be written as a sum of positive squares in 3 ways, for example, as 19395018756 + 507961444 = 139266^2 + 22538^2 .

It is a super-2 number, since 2×19902980200² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 49757251 + ... + 49757650.

Almost surely, 2^19902980200 is an apocalyptic number.

19902980200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19902980200 is an abundant number, since it is smaller than the sum of its proper divisors (26371449230).

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

19902980200 is a wasteful number, since it uses less digits than its factorization.

19902980200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99514917 (or 99514908 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 40.

The spelling of 19902980200 in words is "nineteen billion, nine hundred two million, nine hundred eighty thousand, two hundred".