21369094 has 4 divisors (see below), whose sum is σ = 32053644. Its totient is φ = 10684546.

The previous prime is 21369059. The next prime is 21369109. The reversal of 21369094 is 49096312.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5342272 + ... + 5342275.

It is an arithmetic number, because the mean of its divisors is an integer number (8013411).

Almost surely, 2^21369094 is an apocalyptic number.

21369094 is a deficient number, since it is larger than the sum of its proper divisors (10684550).

21369094 is a wasteful number, since it uses less digits than its factorization.

21369094 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10684549.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 21369094 is about 4622.6717382916. The cubic root of 21369094 is about 277.4993923640.

The spelling of 21369094 in words is "twenty-one million, three hundred sixty-nine thousand, ninety-four".