19961994 has 16 divisors (see below), whose sum is σ = 42995232. Its totient is φ = 6142128.

The previous prime is 19961993. The next prime is 19962017. The reversal of 19961994 is 49916991.

It is not an unprimeable number, because it can be changed into a prime (19961993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127884 + ... + 128039.

It is an arithmetic number, because the mean of its divisors is an integer number (2687202).

Almost surely, 2^19961994 is an apocalyptic number.

19961994 is an abundant number, since it is smaller than the sum of its proper divisors (23033238).

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

19961994 is a wasteful number, since it uses less digits than its factorization.

19961994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255941.

The product of its digits is 157464, while the sum is 48.

The square root of 19961994 is about 4467.8847344129. The cubic root of 19961994 is about 271.2697123718.

The spelling of 19961994 in words is "nineteen million, nine hundred sixty-one thousand, nine hundred ninety-four".