19869994 has 16 divisors (see below), whose sum is σ = 30735936. Its totient is φ = 9628000.

The previous prime is 19869979. The next prime is 19870003. The reversal of 19869994 is 49996891.

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, 12969 + ... + 14419.

It is an arithmetic number, because the mean of its divisors is an integer number (1920996).

Almost surely, 2^19869994 is an apocalyptic number.

19869994 is a deficient number, since it is larger than the sum of its proper divisors (10865942).

19869994 is a wasteful number, since it uses less digits than its factorization.

19869994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1661.

The product of its digits is 1259712, while the sum is 55.

The square root of 19869994 is about 4457.5771445932. The cubic root of 19869994 is about 270.8523316903.

The spelling of 19869994 in words is "nineteen million, eight hundred sixty-nine thousand, nine hundred ninety-four".