21383134 has 8 divisors (see below), whose sum is σ = 32618520. Its totient is φ = 10510296.

The previous prime is 21383111. The next prime is 21383137. The reversal of 21383134 is 43138312.

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

It is a junction number, because it is equal to n+sod(n) for n = 21383099 and 21383108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21383137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90489 + ... + 90724.

It is an arithmetic number, because the mean of its divisors is an integer number (4077315).

Almost surely, 2^21383134 is an apocalyptic number.

21383134 is a deficient number, since it is larger than the sum of its proper divisors (11235386).

21383134 is a wasteful number, since it uses less digits than its factorization.

21383134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181274.

The product of its digits is 1728, while the sum is 25.

The square root of 21383134 is about 4624.1900912484. The cubic root of 21383134 is about 277.5601536127.

The spelling of 21383134 in words is "twenty-one million, three hundred eighty-three thousand, one hundred thirty-four".