21034358 has 8 divisors (see below), whose sum is σ = 31931928. Its totient is φ = 10390384.

The previous prime is 21034357. The next prime is 21034369. The reversal of 21034358 is 85343012.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21034357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63191 + ... + 63522.

It is an arithmetic number, because the mean of its divisors is an integer number (3991491).

Almost surely, 2^21034358 is an apocalyptic number.

21034358 is a deficient number, since it is larger than the sum of its proper divisors (10897570).

21034358 is a wasteful number, since it uses less digits than its factorization.

21034358 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126798.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 21034358 is about 4586.3229280111. The cubic root of 21034358 is about 276.0427977461.

The spelling of 21034358 in words is "twenty-one million, thirty-four thousand, three hundred fifty-eight".