18476486821 has 8 divisors (see below), whose sum is σ = 19907677664. Its totient is φ = 17046713520.

The previous prime is 18476486761. The next prime is 18476486837. The reversal of 18476486821 is 12868467481.

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

It is a cyclic number.

It is not a de Polignac number, because 18476486821 - 2⁹ = 18476486309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18476486851) 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, 327231 + ... + 379516.

It is an arithmetic number, because the mean of its divisors is an integer number (2488459708).

Almost surely, 2^18476486821 is an apocalyptic number.

It is an amenable number.

18476486821 is a deficient number, since it is larger than the sum of its proper divisors (1431190843).

18476486821 is a wasteful number, since it uses less digits than its factorization.

18476486821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708771.

The product of its digits is 4128768, while the sum is 55.

The spelling of 18476486821 in words is "eighteen billion, four hundred seventy-six million, four hundred eighty-six thousand, eight hundred twenty-one".