18241750639 has 16 divisors (see below), whose sum is σ = 22455889920. Its totient is φ = 14473514880.

The previous prime is 18241750633. The next prime is 18241750649. The reversal of 18241750639 is 93605714281.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18241750639 is a prime.

It is a super-2 number, since 2×18241750639² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18241750633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1822474 + ... + 1832455.

It is an arithmetic number, because the mean of its divisors is an integer number (1403493120).

It is a 1-persistent number, because it is pandigital, but 2⋅18241750639 = 36483501278 is not.

Almost surely, 2^18241750639 is an apocalyptic number.

18241750639 is a deficient number, since it is larger than the sum of its proper divisors (4214139281).

18241750639 is a wasteful number, since it uses less digits than its factorization.

18241750639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3654990.

The product of its (nonzero) digits is 362880, while the sum is 46.

The spelling of 18241750639 in words is "eighteen billion, two hundred forty-one million, seven hundred fifty thousand, six hundred thirty-nine".