21334842 has 24 divisors (see below), whose sum is σ = 47354580. Its totient is φ = 6937920.

The previous prime is 21334787. The next prime is 21334849. The reversal of 21334842 is 24843312.

It can be written as a sum of positive squares in 2 ways, for example, as 21150801 + 184041 = 4599^2 + 429^2 .

It is not an unprimeable number, because it can be changed into a prime (21334849) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13717 + ... + 15192.

Almost surely, 2^21334842 is an apocalyptic number.

21334842 is an abundant number, since it is smaller than the sum of its proper divisors (26019738).

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

21334842 is a wasteful number, since it uses less digits than its factorization.

21334842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28958 (or 28955 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 21334842 is about 4618.9654685871. The cubic root of 21334842 is about 277.3510474052.

The spelling of 21334842 in words is "twenty-one million, three hundred thirty-four thousand, eight hundred forty-two".