21741622 has 16 divisors (see below), whose sum is σ = 37372320. Its totient is φ = 9292608.

The previous prime is 21741613. The next prime is 21741631. The reversal of 21741622 is 22614712.

It is an interprime number because it is at equal distance from previous prime (21741613) and next prime (21741631).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3828 + ... + 7624.

It is an arithmetic number, because the mean of its divisors is an integer number (2335770).

Almost surely, 2^21741622 is an apocalyptic number.

21741622 is a deficient number, since it is larger than the sum of its proper divisors (15630698).

21741622 is a wasteful number, since it uses less digits than its factorization.

21741622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4215.

The product of its digits is 1344, while the sum is 25.

The square root of 21741622 is about 4662.7912241489. The cubic root of 21741622 is about 279.1026630233.

The spelling of 21741622 in words is "twenty-one million, seven hundred forty-one thousand, six hundred twenty-two".