19866445714 has 16 divisors (see below), whose sum is σ = 31506271200. Its totient is φ = 9368961984.

The previous prime is 19866445693. The next prime is 19866445727. The reversal of 19866445714 is 41754466891.

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, 1142919 + ... + 1160170.

It is an arithmetic number, because the mean of its divisors is an integer number (1969141950).

Almost surely, 2^19866445714 is an apocalyptic number.

19866445714 is a deficient number, since it is larger than the sum of its proper divisors (11639825486).

19866445714 is a wasteful number, since it uses less digits than its factorization.

19866445714 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2303337.

The product of its digits is 5806080, while the sum is 55.

The spelling of 19866445714 in words is "nineteen billion, eight hundred sixty-six million, four hundred forty-five thousand, seven hundred fourteen".