18682489901 has 4 divisors (see below), whose sum is σ = 18731269632. Its totient is φ = 18633710172.

The previous prime is 18682489817. The next prime is 18682489921. The reversal of 18682489901 is 10998428681.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10998428681 = 17 ⋅646966393.

It is a cyclic number.

It is not a de Polignac number, because 18682489901 - 2¹⁸ = 18682227757 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 (18682489921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24389291 + ... + 24390056.

It is an arithmetic number, because the mean of its divisors is an integer number (4682817408).

Almost surely, 2^18682489901 is an apocalyptic number.

It is an amenable number.

18682489901 is a deficient number, since it is larger than the sum of its proper divisors (48779731).

18682489901 is an equidigital number, since it uses as much as digits as its factorization.

18682489901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48779730.

The product of its (nonzero) digits is 1990656, while the sum is 56.

The spelling of 18682489901 in words is "eighteen billion, six hundred eighty-two million, four hundred eighty-nine thousand, nine hundred one".