19801183800 has 48 divisors (see below), whose sum is σ = 61383671640. Its totient is φ = 5280315520.

The previous prime is 19801183783. The next prime is 19801183817. The reversal of 19801183800 is 838110891.

It is an interprime number because it is at equal distance from previous prime (19801183783) and next prime (19801183817).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16500387 + ... + 16501586.

Almost surely, 2^19801183800 is an apocalyptic number.

19801183800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19801183800 is an abundant number, since it is smaller than the sum of its proper divisors (41582487840).

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

19801183800 is a wasteful number, since it uses less digits than its factorization.

19801183800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33001992 (or 33001983 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 39.

The spelling of 19801183800 in words is "nineteen billion, eight hundred one million, one hundred eighty-three thousand, eight hundred".