19804313772 has 36 divisors (see below), whose sum is σ = 50085475440. Its totient is φ = 6598197792.

The previous prime is 19804313729. The next prime is 19804313779. The reversal of 19804313772 is 27731340891.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (19804313779) 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, 60072 + ... + 207887.

Almost surely, 2^19804313772 is an apocalyptic number.

19804313772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19804313772 is an abundant number, since it is smaller than the sum of its proper divisors (30281161668).

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

19804313772 is a wasteful number, since it uses less digits than its factorization.

19804313772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270022 (or 270017 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The spelling of 19804313772 in words is "nineteen billion, eight hundred four million, three hundred thirteen thousand, seven hundred seventy-two".