18743065406 has 16 divisors (see below), whose sum is σ = 30981383664. Its totient is φ = 8449467264.

The previous prime is 18743065399. The next prime is 18743065421. The reversal of 18743065406 is 60456034781.

It is a congruent number.

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, 8381291 + ... + 8383526.

It is an arithmetic number, because the mean of its divisors is an integer number (1936336479).

Almost surely, 2^18743065406 is an apocalyptic number.

18743065406 is a deficient number, since it is larger than the sum of its proper divisors (12238318258).

18743065406 is a wasteful number, since it uses less digits than its factorization.

18743065406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16764875.

The product of its (nonzero) digits is 483840, while the sum is 44.

The spelling of 18743065406 in words is "eighteen billion, seven hundred forty-three million, sixty-five thousand, four hundred six".