18933039890432 has 144 divisors (see below), whose sum is σ = 39825368537472. Its totient is φ = 8988194242560.

The previous prime is 18933039890423. The next prime is 18933039890441. The reversal of 18933039890432 is 23409893033981.

It is an interprime number because it is at equal distance from previous prime (18933039890423) and next prime (18933039890441).

It is a Harshad number since it is a multiple of its sum of digits (62).

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, 215307338 + ... + 215395254.

It is an arithmetic number, because the mean of its divisors is an integer number (276565059288).

Almost surely, 2^{18933039890432} 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 18933039890432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19912684268736).

18933039890432 is an abundant number, since it is smaller than the sum of its proper divisors (20892328647040).

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

18933039890432 is an frugal number, since it uses more digits than its factorization.

18933039890432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88035 (or 88003 counting only the distinct ones).

The product of its (nonzero) digits is 30233088, while the sum is 62.

The spelling of 18933039890432 in words is "eighteen trillion, nine hundred thirty-three billion, thirty-nine million, eight hundred ninety thousand, four hundred thirty-two".