18044215534 has 4 divisors (see below), whose sum is σ = 27066323304. Its totient is φ = 9022107766.

The previous prime is 18044215457. The next prime is 18044215543. The reversal of 18044215534 is 43551244081.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 18044215493 and 18044215502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4511053882 + ... + 4511053885.

It is an arithmetic number, because the mean of its divisors is an integer number (6766580826).

Almost surely, 2^18044215534 is an apocalyptic number.

18044215534 is a deficient number, since it is larger than the sum of its proper divisors (9022107770).

18044215534 is an equidigital number, since it uses as much as digits as its factorization.

18044215534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9022107769.

The product of its (nonzero) digits is 76800, while the sum is 37.

The spelling of 18044215534 in words is "eighteen billion, forty-four million, two hundred fifteen thousand, five hundred thirty-four".