18639301448 has 32 divisors (see below), whose sum is σ = 36020242560. Its totient is φ = 9035686080.

The previous prime is 18639301441. The next prime is 18639301463. The reversal of 18639301448 is 84410393681.

It is not an unprimeable number, because it can be changed into a prime (18639301441) 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, 27488 + ... + 195023.

It is an arithmetic number, because the mean of its divisors is an integer number (1125632580).

Almost surely, 2^18639301448 is an apocalyptic number.

It is an amenable number.

18639301448 is a deficient number, since it is larger than the sum of its proper divisors (17380941112).

18639301448 is a wasteful number, since it uses less digits than its factorization.

18639301448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222837 (or 222833 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 47.

The spelling of 18639301448 in words is "eighteen billion, six hundred thirty-nine million, three hundred one thousand, four hundred forty-eight".