18164777242 has 8 divisors (see below), whose sum is σ = 27251136000. Its totient is φ = 9081065244.

The previous prime is 18164777177. The next prime is 18164777273. The reversal of 18164777242 is 24277746181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×18164777242² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 644442 + ... + 672037.

It is an arithmetic number, because the mean of its divisors is an integer number (3406392000).

Almost surely, 2^18164777242 is an apocalyptic number.

18164777242 is a deficient number, since it is larger than the sum of its proper divisors (9086358758).

18164777242 is a wasteful number, since it uses less digits than its factorization.

18164777242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1323380.

The product of its digits is 1053696, while the sum is 49.

The spelling of 18164777242 in words is "eighteen billion, one hundred sixty-four million, seven hundred seventy-seven thousand, two hundred forty-two".