18021242746 has 32 divisors (see below), whose sum is σ = 30116708496. Its totient is φ = 8034240000.

The previous prime is 18021242677. The next prime is 18021242761. The reversal of 18021242746 is 64724212081.

It can be written as a sum of positive squares in 8 ways, for example, as 12251169225 + 5770073521 = 110685^2 + 75961^2 .

It is a super-2 number, since 2×18021242746² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23976 + ... + 191356.

Almost surely, 2^18021242746 is an apocalyptic number.

18021242746 is a deficient number, since it is larger than the sum of its proper divisors (12095465750).

18021242746 is a wasteful number, since it uses less digits than its factorization.

18021242746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167538.

The product of its (nonzero) digits is 43008, while the sum is 37.

The spelling of 18021242746 in words is "eighteen billion, twenty-one million, two hundred forty-two thousand, seven hundred forty-six".