21468834 has 32 divisors (see below), whose sum is σ = 47880000. Its totient is φ = 7130592.

The previous prime is 21468829. The next prime is 21468899. The reversal of 21468834 is 43886412.

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 15 ways as a sum of consecutive naturals, for example, 19942 + ... + 20990.

It is an arithmetic number, because the mean of its divisors is an integer number (1496250).

Almost surely, 2^21468834 is an apocalyptic number.

21468834 is an abundant number, since it is smaller than the sum of its proper divisors (26411166).

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

21468834 is a wasteful number, since it uses less digits than its factorization.

21468834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1439 (or 1433 counting only the distinct ones).

The product of its digits is 36864, while the sum is 36.

The square root of 21468834 is about 4633.4473127467. The cubic root of 21468834 is about 277.9304641226.

The spelling of 21468834 in words is "twenty-one million, four hundred sixty-eight thousand, eight hundred thirty-four".