19913892 has 12 divisors (see below), whose sum is σ = 46465776. Its totient is φ = 6637960.

The previous prime is 19913879. The next prime is 19913897. The reversal of 19913892 is 29831991.

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

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (19913897) 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, 829734 + ... + 829757.

It is an arithmetic number, because the mean of its divisors is an integer number (3872148).

Almost surely, 2^19913892 is an apocalyptic number.

19913892 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19913892 is an abundant number, since it is smaller than the sum of its proper divisors (26551884).

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

19913892 is a wasteful number, since it uses less digits than its factorization.

19913892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1659498 (or 1659496 counting only the distinct ones).

The product of its digits is 34992, while the sum is 42.

The square root of 19913892 is about 4462.4984033611. The cubic root of 19913892 is about 271.0516461347.

The spelling of 19913892 in words is "nineteen million, nine hundred thirteen thousand, eight hundred ninety-two".