21334005 has 96 divisors (see below), whose sum is σ = 47443968. Its totient is φ = 8611200.

The previous prime is 21333973. The next prime is 21334007. The reversal of 21334005 is 50043312.

It is not a de Polignac number, because 21334005 - 2⁵ = 21333973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21334007) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 162790 + ... + 162920.

It is an arithmetic number, because the mean of its divisors is an integer number (494208).

Almost surely, 2^21334005 is an apocalyptic number.

It is an amenable number.

21334005 is an abundant number, since it is smaller than the sum of its proper divisors (26109963).

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

21334005 is a wasteful number, since it uses less digits than its factorization.

21334005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207 (or 204 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 21334005 is about 4618.8748629942. The cubic root of 21334005 is about 277.3474203826.

Adding to 21334005 its reverse (50043312), we get a palindrome (71377317).

The spelling of 21334005 in words is "twenty-one million, three hundred thirty-four thousand, five".