18693436532844 has 96 divisors (see below), whose sum is σ = 46231646836480. Its totient is φ = 5862418219008.

The previous prime is 18693436532843. The next prime is 18693436532879. The reversal of 18693436532844 is 44823563439681.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (18693436532843) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25022187 + ... + 25758429.

Almost surely, 2^{18693436532844} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18693436532844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23115823418240).

18693436532844 is an abundant number, since it is smaller than the sum of its proper divisors (27538210303636).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18693436532844 is a wasteful number, since it uses less digits than its factorization.

18693436532844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 737039 (or 737037 counting only the distinct ones).

The product of its digits is 358318080, while the sum is 66.

The spelling of 18693436532844 in words is "eighteen trillion, six hundred ninety-three billion, four hundred thirty-six million, five hundred thirty-two thousand, eight hundred forty-four".