19499994 has 16 divisors (see below), whose sum is σ = 43333440. Its totient is φ = 6499980.

The previous prime is 19499983. The next prime is 19500017. The reversal of 19499994 is 49999491.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 361111 = 19499994 / (1 + 9 + 4 + 9 + 9 + 9 + 9 + 4).

It is a self number, because there is not a number n which added to its sum of digits gives 19499994.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 180502 + ... + 180609.

It is an arithmetic number, because the mean of its divisors is an integer number (2708340).

Almost surely, 2^19499994 is an apocalyptic number.

19499994 is an abundant number, since it is smaller than the sum of its proper divisors (23833446).

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

19499994 is a wasteful number, since it uses less digits than its factorization.

19499994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361122 (or 361116 counting only the distinct ones).

The product of its digits is 944784, while the sum is 54.

The square root of 19499994 is about 4415.8797537977. The cubic root of 19499994 is about 269.1606029981.

The spelling of 19499994 in words is "nineteen million, four hundred ninety-nine thousand, nine hundred ninety-four".