19423912 has 8 divisors (see below), whose sum is σ = 36419850. Its totient is φ = 9711952.

The previous prime is 19423897. The next prime is 19423919. The reversal of 19423912 is 21932491.

It can be written as a sum of positive squares in only one way, i.e., 10023556 + 9400356 = 3166^2 + 3066^2 .

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

It is not an unprimeable number, because it can be changed into a prime (19423919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1213987 + ... + 1214002.

Almost surely, 2^19423912 is an apocalyptic number.

It is an amenable number.

19423912 is a deficient number, since it is larger than the sum of its proper divisors (16995938).

19423912 is a wasteful number, since it uses less digits than its factorization.

19423912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2427995 (or 2427991 counting only the distinct ones).

The product of its digits is 3888, while the sum is 31.

The square root of 19423912 is about 4407.2567431453. The cubic root of 19423912 is about 268.8100906194.

The spelling of 19423912 in words is "nineteen million, four hundred twenty-three thousand, nine hundred twelve".