19431992 has 8 divisors (see below), whose sum is σ = 36435000. Its totient is φ = 9715992.

The previous prime is 19431989. The next prime is 19432013. The reversal of 19431992 is 29913491.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1214492 + ... + 1214507.

It is an arithmetic number, because the mean of its divisors is an integer number (4554375).

Almost surely, 2^19431992 is an apocalyptic number.

It is an amenable number.

19431992 is a deficient number, since it is larger than the sum of its proper divisors (17003008).

19431992 is a wasteful number, since it uses less digits than its factorization.

19431992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2429005 (or 2429001 counting only the distinct ones).

The product of its digits is 17496, while the sum is 38.

The square root of 19431992 is about 4408.1733178268. The cubic root of 19431992 is about 268.8473588489.

The spelling of 19431992 in words is "nineteen million, four hundred thirty-one thousand, nine hundred ninety-two".