21634505222 has 24 divisors (see below), whose sum is σ = 35756273016. Its totient is φ = 9736400000.

The previous prime is 21634505197. The next prime is 21634505227. The reversal of 21634505222 is 22250543612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21634505227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 176222 + ... + 272622.

It is an arithmetic number, because the mean of its divisors is an integer number (1489844709).

Almost surely, 2^21634505222 is an apocalyptic number.

21634505222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21634505222 is a deficient number, since it is larger than the sum of its proper divisors (14121767794).

21634505222 is a wasteful number, since it uses less digits than its factorization.

21634505222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96616 (or 96515 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 32.

The spelling of 21634505222 in words is "twenty-one billion, six hundred thirty-four million, five hundred five thousand, two hundred twenty-two".