18208849287742 has 4 divisors (see below), whose sum is σ = 27313273931616. Its totient is φ = 9104424643870.

The previous prime is 18208849287731. The next prime is 18208849287767. The reversal of 18208849287742 is 24778294880281.

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

It is a super-2 number, since 2×18208849287742² (a number of 27 digits) contains 22 as substring.

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, 4552212321934 + ... + 4552212321937.

It is an arithmetic number, because the mean of its divisors is an integer number (6828318482904).

Almost surely, 2^{18208849287742} is an apocalyptic number.

18208849287742 is a deficient number, since it is larger than the sum of its proper divisors (9104424643874).

18208849287742 is an equidigital number, since it uses as much as digits as its factorization.

18208849287742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9104424643873.

The product of its (nonzero) digits is 231211008, while the sum is 70.

The spelling of 18208849287742 in words is "eighteen trillion, two hundred eight billion, eight hundred forty-nine million, two hundred eighty-seven thousand, seven hundred forty-two".