21022246288 has 10 divisors (see below), whose sum is σ = 40730602214. Its totient is φ = 10511123136.

The previous prime is 21022246283. The next prime is 21022246313. The reversal of 21022246288 is 88264222012.

It can be written as a sum of positive squares in only one way, i.e., 15146717184 + 5875529104 = 123072^2 + 76652^2 .

It is not an unprimeable number, because it can be changed into a prime (21022246283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656945181 + ... + 656945212.

Almost surely, 2^21022246288 is an apocalyptic number.

It is an amenable number.

21022246288 is a deficient number, since it is larger than the sum of its proper divisors (19708355926).

21022246288 is a wasteful number, since it uses less digits than its factorization.

21022246288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1313890401 (or 1313890395 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 37.

The spelling of 21022246288 in words is "twenty-one billion, twenty-two million, two hundred forty-six thousand, two hundred eighty-eight".