19421724112 has 40 divisors (see below), whose sum is σ = 43194753216. Its totient is φ = 8286917376.

The previous prime is 19421724109. The next prime is 19421724121. The reversal of 19421724112 is 21142712491.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 356533 + ... + 407380.

Almost surely, 2^19421724112 is an apocalyptic number.

It is an amenable number.

19421724112 is an abundant number, since it is smaller than the sum of its proper divisors (23773029104).

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

19421724112 is a wasteful number, since it uses less digits than its factorization.

19421724112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 764155 (or 764149 counting only the distinct ones).

The product of its digits is 8064, while the sum is 34.

The spelling of 19421724112 in words is "nineteen billion, four hundred twenty-one million, seven hundred twenty-four thousand, one hundred twelve".