21834764 has 48 divisors (see below), whose sum is σ = 45147648. Its totient is φ = 9047808.

The previous prime is 21834737. The next prime is 21834793. The reversal of 21834764 is 46743812.

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, 193172 + ... + 193284.

It is an arithmetic number, because the mean of its divisors is an integer number (940576).

Almost surely, 2^21834764 is an apocalyptic number.

It is an amenable number.

21834764 is an abundant number, since it is smaller than the sum of its proper divisors (23312884).

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

21834764 is a wasteful number, since it uses less digits than its factorization.

21834764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294 (or 292 counting only the distinct ones).

The product of its digits is 32256, while the sum is 35.

The square root of 21834764 is about 4672.7683443543. The cubic root of 21834764 is about 279.5006576384.

The spelling of 21834764 in words is "twenty-one million, eight hundred thirty-four thousand, seven hundred sixty-four".