18645818309702 has 16 divisors (see below), whose sum is σ = 27984749605632. Its totient is φ = 9317569827720.

The previous prime is 18645818309647. The next prime is 18645818309861. The reversal of 18645818309702 is 20790381854681.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26857127 + ... + 27542637.

It is an arithmetic number, because the mean of its divisors is an integer number (1749046850352).

It is a 1-persistent number, because it is pandigital, but 2⋅18645818309702 = 37291636619404 is not.

Almost surely, 2^{18645818309702} is an apocalyptic number.

18645818309702 is a deficient number, since it is larger than the sum of its proper divisors (9338931295930).

18645818309702 is a wasteful number, since it uses less digits than its factorization.

18645818309702 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693283.

The product of its (nonzero) digits is 23224320, while the sum is 62.

The spelling of 18645818309702 in words is "eighteen trillion, six hundred forty-five billion, eight hundred eighteen million, three hundred nine thousand, seven hundred two".