18811453441 has 8 divisors (see below), whose sum is σ = 20523099168. Its totient is φ = 17100060000.

The previous prime is 18811453433. The next prime is 18811453447. The reversal of 18811453441 is 14435411881.

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 18811453441 - 2³ = 18811453433 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18811453394 and 18811453403.

It is not an unprimeable number, because it can be changed into a prime (18811453447) 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, 114621 + ... + 225301.

It is an arithmetic number, because the mean of its divisors is an integer number (2565387396).

It is a Proth number, since it is equal to 4485 ⋅ 2²² + 1 and 4485 < 2²².

Almost surely, 2^18811453441 is an apocalyptic number.

18811453441 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18811453441 is a deficient number, since it is larger than the sum of its proper divisors (1711645727).

18811453441 is a wasteful number, since it uses less digits than its factorization.

18811453441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126143.

The product of its digits is 61440, while the sum is 40.

The spelling of 18811453441 in words is "eighteen billion, eight hundred eleven million, four hundred fifty-three thousand, four hundred forty-one".