19913412 has 12 divisors (see below), whose sum is σ = 46464656. Its totient is φ = 6637800.

The previous prime is 19913407. The next prime is 19913417. The reversal of 19913412 is 21431991.

It is an interprime number because it is at equal distance from previous prime (19913407) and next prime (19913417).

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

It is a self number, because there is not a number n which added to its sum of digits gives 19913412.

It is not an unprimeable number, because it can be changed into a prime (19913417) 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, 829714 + ... + 829737.

Almost surely, 2^19913412 is an apocalyptic number.

19913412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19913412 is an abundant number, since it is smaller than the sum of its proper divisors (26551244).

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

19913412 is a wasteful number, since it uses less digits than its factorization.

19913412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1659458 (or 1659456 counting only the distinct ones).

The product of its digits is 1944, while the sum is 30.

The square root of 19913412 is about 4462.4446215051. Note that the first 3 decimals coincide. The cubic root of 19913412 is about 271.0494683277.

The spelling of 19913412 in words is "nineteen million, nine hundred thirteen thousand, four hundred twelve".