18943583089431 has 128 divisors (see below), whose sum is σ = 35258030438400. Its totient is φ = 8912439244800.

The previous prime is 18943583089421. The next prime is 18943583089507. The reversal of 18943583089431 is 13498038534981.

It is a happy number.

It is not a de Polignac number, because 18943583089431 - 2²⁵ = 18943549534999 is a prime.

It is a super-2 number, since 2×18943583089431² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18943583089421) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 6584271 + ... + 9013311.

It is an arithmetic number, because the mean of its divisors is an integer number (275453362800).

Almost surely, 2^{18943583089431} is an apocalyptic number.

18943583089431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

18943583089431 is a deficient number, since it is larger than the sum of its proper divisors (16314447348969).

18943583089431 is a wasteful number, since it uses less digits than its factorization.

18943583089431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2429142 (or 2429128 counting only the distinct ones).

The product of its (nonzero) digits is 89579520, while the sum is 66.

The spelling of 18943583089431 in words is "eighteen trillion, nine hundred forty-three billion, five hundred eighty-three million, eighty-nine thousand, four hundred thirty-one".