19745994 has 16 divisors (see below), whose sum is σ = 39862368. Its totient is φ = 6520272.

The previous prime is 19745963. The next prime is 19746017. The reversal of 19745994 is 49954791.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14737 + ... + 16020.

It is an arithmetic number, because the mean of its divisors is an integer number (2491398).

Almost surely, 2^19745994 is an apocalyptic number.

19745994 is an abundant number, since it is smaller than the sum of its proper divisors (20116374).

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

19745994 is a wasteful number, since it uses less digits than its factorization.

19745994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30869.

The product of its digits is 408240, while the sum is 48.

The square root of 19745994 is about 4443.6464755874. The cubic root of 19745994 is about 270.2877316720.

The spelling of 19745994 in words is "nineteen million, seven hundred forty-five thousand, nine hundred ninety-four".