21334838 has 8 divisors (see below), whose sum is σ = 36574032. Its totient is φ = 9143496.

The previous prime is 21334787. The next prime is 21334849. The reversal of 21334838 is 83843312.

It is a happy number.

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, 761945 + ... + 761972.

It is an arithmetic number, because the mean of its divisors is an integer number (4571754).

Almost surely, 2^21334838 is an apocalyptic number.

21334838 is a deficient number, since it is larger than the sum of its proper divisors (15239194).

21334838 is a wasteful number, since it uses less digits than its factorization.

21334838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1523926.

The product of its digits is 13824, while the sum is 32.

The square root of 21334838 is about 4618.9650355897. The cubic root of 21334838 is about 277.3510300719.

The spelling of 21334838 in words is "twenty-one million, three hundred thirty-four thousand, eight hundred thirty-eight".