18094657940 has 24 divisors (see below), whose sum is σ = 38006177832. Its totient is φ = 7236454400.

The previous prime is 18094657883. The next prime is 18094657943. The reversal of 18094657940 is 4975649081.

It can be written as a sum of positive squares in 4 ways, for example, as 6472524304 + 11622133636 = 80452^2 + 107806^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18094657943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20540 + ... + 191340.

It is an arithmetic number, because the mean of its divisors is an integer number (1583590743).

Almost surely, 2^18094657940 is an apocalyptic number.

18094657940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18094657940 is an abundant number, since it is smaller than the sum of its proper divisors (19911519892).

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

18094657940 is a wasteful number, since it uses less digits than its factorization.

18094657940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176107 (or 176105 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 53.

The spelling of 18094657940 in words is "eighteen billion, ninety-four million, six hundred fifty-seven thousand, nine hundred forty".