18010696821 has 8 divisors (see below), whose sum is σ = 25861513440. Its totient is φ = 11083505712.

The previous prime is 18010696813. The next prime is 18010696841. The reversal of 18010696821 is 12869601081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18010696821 - 2³ = 18010696813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18010696811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 230906331 + ... + 230906408.

It is an arithmetic number, because the mean of its divisors is an integer number (3232689180).

Almost surely, 2^18010696821 is an apocalyptic number.

It is an amenable number.

18010696821 is a deficient number, since it is larger than the sum of its proper divisors (7850816619).

18010696821 is a wasteful number, since it uses less digits than its factorization.

18010696821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461812755.

The product of its (nonzero) digits is 41472, while the sum is 42.

The spelling of 18010696821 in words is "eighteen billion, ten million, six hundred ninety-six thousand, eight hundred twenty-one".