21834366 has 32 divisors (see below), whose sum is σ = 45636480. Its totient is φ = 6957216.

The previous prime is 21834353. The next prime is 21834391. The reversal of 21834366 is 66343812.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12265 + ... + 13931.

It is an arithmetic number, because the mean of its divisors is an integer number (1426140).

Almost surely, 2^21834366 is an apocalyptic number.

21834366 is an abundant number, since it is smaller than the sum of its proper divisors (23802114).

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

21834366 is a wasteful number, since it uses less digits than its factorization.

21834366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1768.

The product of its digits is 20736, while the sum is 33.

The square root of 21834366 is about 4672.7257569860. The cubic root of 21834366 is about 279.4989593995.

The spelling of 21834366 in words is "twenty-one million, eight hundred thirty-four thousand, three hundred sixty-six".