21842264 has 16 divisors (see below), whose sum is σ = 41202000. Its totient is φ = 10855072.

The previous prime is 21842243. The next prime is 21842269. The reversal of 21842264 is 46224812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21842269) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 6839 + ... + 9510.

It is an arithmetic number, because the mean of its divisors is an integer number (2575125).

Almost surely, 2^21842264 is an apocalyptic number.

It is an amenable number.

21842264 is a deficient number, since it is larger than the sum of its proper divisors (19359736).

21842264 is a wasteful number, since it uses less digits than its factorization.

21842264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16522 (or 16518 counting only the distinct ones).

The product of its digits is 6144, while the sum is 29.

The square root of 21842264 is about 4673.5707975808. The cubic root of 21842264 is about 279.5326557702.

The spelling of 21842264 in words is "twenty-one million, eight hundred forty-two thousand, two hundred sixty-four".