18072101690 has 8 divisors (see below), whose sum is σ = 32529783060. Its totient is φ = 7228840672.

The previous prime is 18072101633. The next prime is 18072101711. The reversal of 18072101690 is 9610127081.

It can be written as a sum of positive squares in 2 ways, for example, as 16083566041 + 1988535649 = 126821^2 + 44593^2 .

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

It is a super-2 number, since 2×18072101690² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18072101690.

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 3 ways as a sum of consecutive naturals, for example, 903605075 + ... + 903605094.

Almost surely, 2^18072101690 is an apocalyptic number.

18072101690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18072101690 is a deficient number, since it is larger than the sum of its proper divisors (14457681370).

18072101690 is a wasteful number, since it uses less digits than its factorization.

18072101690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1807210176.

The product of its (nonzero) digits is 6048, while the sum is 35.

The spelling of 18072101690 in words is "eighteen billion, seventy-two million, one hundred one thousand, six hundred ninety".