18003780434 has 8 divisors (see below), whose sum is σ = 27184516608. Its totient is φ = 8942274900.

The previous prime is 18003780413. The next prime is 18003780437. The reversal of 18003780434 is 43408730081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×18003780434² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18003780437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29807282 + ... + 29807885.

It is an arithmetic number, because the mean of its divisors is an integer number (3398064576).

Almost surely, 2^18003780434 is an apocalyptic number.

18003780434 is a deficient number, since it is larger than the sum of its proper divisors (9180736174).

18003780434 is a wasteful number, since it uses less digits than its factorization.

18003780434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59615320.

The product of its (nonzero) digits is 64512, while the sum is 38.

The spelling of 18003780434 in words is "eighteen billion, three million, seven hundred eighty thousand, four hundred thirty-four".