19669669669806 has 32 divisors (see below), whose sum is σ = 44207418124800. Its totient is φ = 5789066658144.

The previous prime is 19669669669787. The next prime is 19669669669861. The reversal of 19669669669806 is 60896696696691.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5482068906 + ... + 5482072493.

It is an arithmetic number, because the mean of its divisors is an integer number (1381481816400).

Almost surely, 2^{19669669669806} is an apocalyptic number.

19669669669806 is an abundant number, since it is smaller than the sum of its proper divisors (24537748454994).

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

19669669669806 is a wasteful number, since it uses less digits than its factorization.

19669669669806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10964141440.

The product of its (nonzero) digits is 14693280768, while the sum is 87.

The spelling of 19669669669806 in words is "nineteen trillion, six hundred sixty-nine billion, six hundred sixty-nine million, six hundred sixty-nine thousand, eight hundred six".