21743622 has 12 divisors (see below), whose sum is σ = 47111220. Its totient is φ = 7247868.

The previous prime is 21743611. The next prime is 21743627. The reversal of 21743622 is 22634712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21743627) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 603972 + ... + 604007.

It is an arithmetic number, because the mean of its divisors is an integer number (3925935).

Almost surely, 2^21743622 is an apocalyptic number.

21743622 is an abundant number, since it is smaller than the sum of its proper divisors (25367598).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21743622 is a wasteful number, since it uses less digits than its factorization.

21743622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1207987 (or 1207984 counting only the distinct ones).

The product of its digits is 4032, while the sum is 27.

The square root of 21743622 is about 4663.0056830332. The cubic root of 21743622 is about 279.1112209284. Note that the first 3 decimals are identical.

The spelling of 21743622 in words is "twenty-one million, seven hundred forty-three thousand, six hundred twenty-two".