21373334 has 4 divisors (see below), whose sum is σ = 32060004. Its totient is φ = 10686666.

The previous prime is 21373333. The next prime is 21373337. The reversal of 21373334 is 43337312.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21373333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5343332 + ... + 5343335.

It is an arithmetic number, because the mean of its divisors is an integer number (8015001).

Almost surely, 2^21373334 is an apocalyptic number.

21373334 is a deficient number, since it is larger than the sum of its proper divisors (10686670).

21373334 is a wasteful number, since it uses less digits than its factorization.

21373334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10686669.

The product of its digits is 4536, while the sum is 26.

The square root of 21373334 is about 4623.1303247908. The cubic root of 21373334 is about 277.5177447193.

The spelling of 21373334 in words is "twenty-one million, three hundred seventy-three thousand, three hundred thirty-four".