19677994 has 16 divisors (see below), whose sum is σ = 34822656. Its totient is φ = 8161200.

The previous prime is 19677971. The next prime is 19678013. The reversal of 19677994 is 49977691.

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, 22237 + ... + 23104.

It is an arithmetic number, because the mean of its divisors is an integer number (2176416).

Almost surely, 2^19677994 is an apocalyptic number.

19677994 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

19677994 is a deficient number, since it is larger than the sum of its proper divisors (15144662).

19677994 is a wasteful number, since it uses less digits than its factorization.

19677994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45381.

The product of its digits is 857304, while the sum is 52.

The square root of 19677994 is about 4435.9885031411. The cubic root of 19677994 is about 269.9771082558.

The spelling of 19677994 in words is "nineteen million, six hundred seventy-seven thousand, nine hundred ninety-four".