21224280316 has 24 divisors (see below), whose sum is σ = 37247530320. Its totient is φ = 10582173312.

The previous prime is 21224280271. The next prime is 21224280347. The reversal of 21224280316 is 61308242212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2199390 + ... + 2209018.

It is an arithmetic number, because the mean of its divisors is an integer number (1551980430).

Almost surely, 2^21224280316 is an apocalyptic number.

It is an amenable number.

21224280316 is a deficient number, since it is larger than the sum of its proper divisors (16023250004).

21224280316 is a wasteful number, since it uses less digits than its factorization.

21224280316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11133 (or 11131 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 31.

The spelling of 21224280316 in words is "twenty-one billion, two hundred twenty-four million, two hundred eighty thousand, three hundred sixteen".