19843274028 has 12 divisors (see below), whose sum is σ = 46300972760. Its totient is φ = 6614424672.

The previous prime is 19843273999. The next prime is 19843274057. The reversal of 19843274028 is 82047234891.

It is an interprime number because it is at equal distance from previous prime (19843273999) and next prime (19843274057).

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-3 number, since 3×19843274028³ (a number of 32 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 826803073 + ... + 826803096.

Almost surely, 2^19843274028 is an apocalyptic number.

It is an amenable number.

19843274028 is an abundant number, since it is smaller than the sum of its proper divisors (26457698732).

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

19843274028 is a wasteful number, since it uses less digits than its factorization.

19843274028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1653606176 (or 1653606174 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 48.

The spelling of 19843274028 in words is "nineteen billion, eight hundred forty-three million, two hundred seventy-four thousand, twenty-eight".