21522041366 has 24 divisors (see below), whose sum is σ = 38114281656. Its totient is φ = 9086061600.

The previous prime is 21522041329. The next prime is 21522041371. The reversal of 21522041366 is 66314022512.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1632335 + ... + 1645466.

It is an arithmetic number, because the mean of its divisors is an integer number (1588095069).

Almost surely, 2^21522041366 is an apocalyptic number.

21522041366 is a deficient number, since it is larger than the sum of its proper divisors (16592240290).

21522041366 is a wasteful number, since it uses less digits than its factorization.

21522041366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3277884 (or 3277877 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

Adding to 21522041366 its reverse (66314022512), we get a palindrome (87836063878).

The spelling of 21522041366 in words is "twenty-one billion, five hundred twenty-two million, forty-one thousand, three hundred sixty-six".