19998372 has 12 divisors (see below), whose sum is σ = 46662896. Its totient is φ = 6666120.

The previous prime is 19998367. The next prime is 19998373. The reversal of 19998372 is 27389991.

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

It is not an unprimeable number, because it can be changed into a prime (19998373) 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, 833254 + ... + 833277.

Almost surely, 2^19998372 is an apocalyptic number.

19998372 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19998372 is an abundant number, since it is smaller than the sum of its proper divisors (26664524).

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

19998372 is a wasteful number, since it uses less digits than its factorization.

19998372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1666538 (or 1666536 counting only the distinct ones).

The product of its digits is 244944, while the sum is 48.

The square root of 19998372 is about 4471.9539353620. The cubic root of 19998372 is about 271.4343963398.

The spelling of 19998372 in words is "nineteen million, nine hundred ninety-eight thousand, three hundred seventy-two".