19613998 has 16 divisors (see below), whose sum is σ = 30073680. Its totient is φ = 9592000.

The previous prime is 19613987. The next prime is 19614017. The reversal of 19613998 is 89931691.

It is a congruent number.

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, 17433 + ... + 18523.

It is an arithmetic number, because the mean of its divisors is an integer number (1879605).

Almost surely, 2^19613998 is an apocalyptic number.

19613998 is a deficient number, since it is larger than the sum of its proper divisors (10459682).

19613998 is a wasteful number, since it uses less digits than its factorization.

19613998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1283.

The product of its digits is 104976, while the sum is 46.

The square root of 19613998 is about 4428.7693550240. The cubic root of 19613998 is about 269.6841207589.

The spelling of 19613998 in words is "nineteen million, six hundred thirteen thousand, nine hundred ninety-eight".