18840233134 has 4 divisors (see below), whose sum is σ = 28260349704. Its totient is φ = 9420116566.

The previous prime is 18840233131. The next prime is 18840233143. The reversal of 18840233134 is 43133204881.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 18840233093 and 18840233102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18840233131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4710058282 + ... + 4710058285.

It is an arithmetic number, because the mean of its divisors is an integer number (7065087426).

Almost surely, 2^18840233134 is an apocalyptic number.

18840233134 is a deficient number, since it is larger than the sum of its proper divisors (9420116570).

18840233134 is an equidigital number, since it uses as much as digits as its factorization.

18840233134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9420116569.

The product of its (nonzero) digits is 55296, while the sum is 37.

The spelling of 18840233134 in words is "eighteen billion, eight hundred forty million, two hundred thirty-three thousand, one hundred thirty-four".