18693021094 has 16 divisors (see below), whose sum is σ = 31107032640. Its totient is φ = 8352813160.

The previous prime is 18693021089. The next prime is 18693021107. The reversal of 18693021094 is 49012039681.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 18693021094.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7199404 + ... + 7201999.

It is an arithmetic number, because the mean of its divisors is an integer number (1944189540).

Almost surely, 2^18693021094 is an apocalyptic number.

18693021094 is a deficient number, since it is larger than the sum of its proper divisors (12414011546).

18693021094 is a wasteful number, since it uses less digits than its factorization.

18693021094 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14401475.

The product of its (nonzero) digits is 93312, while the sum is 43.

The spelling of 18693021094 in words is "eighteen billion, six hundred ninety-three million, twenty-one thousand, ninety-four".