19843972 has 12 divisors (see below), whose sum is σ = 35145936. Its totient is φ = 9802280.

The previous prime is 19843949. The next prime is 19843979. The reversal of 19843972 is 27934891.

It is not an unprimeable number, because it can be changed into a prime (19843979) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29554 + ... + 30217.

It is an arithmetic number, because the mean of its divisors is an integer number (2928828).

Almost surely, 2^19843972 is an apocalyptic number.

It is an amenable number.

19843972 is a deficient number, since it is larger than the sum of its proper divisors (15301964).

19843972 is a wasteful number, since it uses less digits than its factorization.

19843972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59858 (or 59856 counting only the distinct ones).

The product of its digits is 108864, while the sum is 43.

The square root of 19843972 is about 4454.6573381126. The cubic root of 19843972 is about 270.7340428040.

The spelling of 19843972 in words is "nineteen million, eight hundred forty-three thousand, nine hundred seventy-two".