19727609900 has 36 divisors (see below), whose sum is σ = 42907873512. Its totient is φ = 7872802560.

The previous prime is 19727609849. The next prime is 19727609911. The reversal of 19727609900 is 990672791.

It is a Harshad number since it is a multiple of its sum of digits (50).

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, 184502 + ... + 271101.

Almost surely, 2^19727609900 is an apocalyptic number.

19727609900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19727609900 is an abundant number, since it is smaller than the sum of its proper divisors (23180263612).

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

19727609900 is a wasteful number, since it uses less digits than its factorization.

19727609900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456050 (or 456043 counting only the distinct ones).

The product of its (nonzero) digits is 428652, while the sum is 50.

The spelling of 19727609900 in words is "nineteen billion, seven hundred twenty-seven million, six hundred nine thousand, nine hundred".