18005970311 has 8 divisors (see below), whose sum is σ = 20581933440. Its totient is φ = 15430927608.

The previous prime is 18005970277. The next prime is 18005970329. The reversal of 18005970311 is 11307950081.

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

It is a cyclic number.

It is not a de Polignac number, because 18005970311 - 2²² = 18001776007 is a prime.

It is a super-2 number, since 2×18005970311² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18005972311) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 187661 + ... + 266886.

It is an arithmetic number, because the mean of its divisors is an integer number (2572741680).

Almost surely, 2^18005970311 is an apocalyptic number.

18005970311 is a deficient number, since it is larger than the sum of its proper divisors (2575963129).

18005970311 is an equidigital number, since it uses as much as digits as its factorization.

18005970311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460213.

The product of its (nonzero) digits is 7560, while the sum is 35.

The spelling of 18005970311 in words is "eighteen billion, five million, nine hundred seventy thousand, three hundred eleven".