21338007 has 8 divisors (see below), whose sum is σ = 29948160. Its totient is φ = 13476600.

The previous prime is 21338003. The next prime is 21338039. The reversal of 21338007 is 70083312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21338007 - 2² = 21338003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21338003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187119 + ... + 187232.

It is an arithmetic number, because the mean of its divisors is an integer number (3743520).

Almost surely, 2^21338007 is an apocalyptic number.

21338007 is a deficient number, since it is larger than the sum of its proper divisors (8610153).

21338007 is a wasteful number, since it uses less digits than its factorization.

21338007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374373.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 21338007 is about 4619.3080650678. The cubic root of 21338007 is about 277.3647616331.

The spelling of 21338007 in words is "twenty-one million, three hundred thirty-eight thousand, seven".