19949986 has 16 divisors (see below), whose sum is σ = 34280064. Its totient is φ = 8529984.

The previous prime is 19949977. The next prime is 19950013. The reversal of 19949986 is 68994991.

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, 5626 + ... + 8458.

It is an arithmetic number, because the mean of its divisors is an integer number (2142504).

Almost surely, 2^19949986 is an apocalyptic number.

19949986 is a deficient number, since it is larger than the sum of its proper divisors (14330078).

19949986 is a wasteful number, since it uses less digits than its factorization.

19949986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3345.

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

The square root of 19949986 is about 4466.5407196174. The cubic root of 19949986 is about 271.2153079858.

The spelling of 19949986 in words is "nineteen million, nine hundred forty-nine thousand, nine hundred eighty-six".