18242279290 has 16 divisors (see below), whose sum is σ = 32838504840. Its totient is φ = 7296377920.

The previous prime is 18242279287. The next prime is 18242279291. The reversal of 18242279290 is 9297224281.

It can be written as a sum of positive squares in 4 ways, for example, as 10558179009 + 7684100281 = 102753^2 + 87659^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18242279290.

It is not an unprimeable number, because it can be changed into a prime (18242279291) 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, 95616 + ... + 213604.

Almost surely, 2^18242279290 is an apocalyptic number.

18242279290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18242279290 is a deficient number, since it is larger than the sum of its proper divisors (14596225550).

18242279290 is a wasteful number, since it uses less digits than its factorization.

18242279290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133457.

The product of its (nonzero) digits is 290304, while the sum is 46.

The spelling of 18242279290 in words is "eighteen billion, two hundred forty-two million, two hundred seventy-nine thousand, two hundred ninety".