18441687038 has 16 divisors (see below), whose sum is σ = 28415047200. Its totient is φ = 8970090336.

The previous prime is 18441687037. The next prime is 18441687067. The reversal of 18441687038 is 83078614481.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18441687037) 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, 496295 + ... + 532157.

It is an arithmetic number, because the mean of its divisors is an integer number (1775940450).

Almost surely, 2^18441687038 is an apocalyptic number.

18441687038 is a deficient number, since it is larger than the sum of its proper divisors (9973360162).

18441687038 is a wasteful number, since it uses less digits than its factorization.

18441687038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42851.

The product of its (nonzero) digits is 1032192, while the sum is 50.

The spelling of 18441687038 in words is "eighteen billion, four hundred forty-one million, six hundred eighty-seven thousand, thirty-eight".