18099867542 has 4 divisors (see below), whose sum is σ = 27149801316. Its totient is φ = 9049933770.

The previous prime is 18099867439. The next prime is 18099867551. The reversal of 18099867542 is 24576899081.

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

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, 4524966884 + ... + 4524966887.

It is an arithmetic number, because the mean of its divisors is an integer number (6787450329).

Almost surely, 2^18099867542 is an apocalyptic number.

18099867542 is a deficient number, since it is larger than the sum of its proper divisors (9049933774).

18099867542 is an equidigital number, since it uses as much as digits as its factorization.

18099867542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9049933773.

The product of its (nonzero) digits is 8709120, while the sum is 59.

The spelling of 18099867542 in words is "eighteen billion, ninety-nine million, eight hundred sixty-seven thousand, five hundred forty-two".