21903230144 has 28 divisors (see below), whose sum is σ = 43477199304. Its totient is φ = 10948345344.

The previous prime is 21903230143. The next prime is 21903230147. The reversal of 21903230144 is 44103230912.

It is not an unprimeable number, because it can be changed into a prime (21903230143) 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, 172532 + ... + 271244.

It is an arithmetic number, because the mean of its divisors is an integer number (1552757118).

Almost surely, 2^21903230144 is an apocalyptic number.

It is an amenable number.

21903230144 is a deficient number, since it is larger than the sum of its proper divisors (21573969160).

21903230144 is an equidigital number, since it uses as much as digits as its factorization.

21903230144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102192 (or 102182 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The spelling of 21903230144 in words is "twenty-one billion, nine hundred three million, two hundred thirty thousand, one hundred forty-four".