21054334 has 8 divisors (see below), whose sum is σ = 36093168. Its totient is φ = 9023280.

The previous prime is 21054329. The next prime is 21054343. The reversal of 21054334 is 43345012.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 751927 + ... + 751954.

It is an arithmetic number, because the mean of its divisors is an integer number (4511646).

Almost surely, 2^21054334 is an apocalyptic number.

21054334 is a deficient number, since it is larger than the sum of its proper divisors (15038834).

21054334 is a wasteful number, since it uses less digits than its factorization.

21054334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1503890.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 21054334 is about 4588.5001906941. The cubic root of 21054334 is about 276.1301546038.

Adding to 21054334 its reverse (43345012), we get a palindrome (64399346).

The spelling of 21054334 in words is "twenty-one million, fifty-four thousand, three hundred thirty-four".