21010334 has 8 divisors (see below), whose sum is σ = 33369408. Its totient is φ = 9887200.

The previous prime is 21010321. The next prime is 21010337. The reversal of 21010334 is 43301012.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010337) 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, 308942 + ... + 309009.

It is an arithmetic number, because the mean of its divisors is an integer number (4171176).

Almost surely, 2^21010334 is an apocalyptic number.

21010334 is a deficient number, since it is larger than the sum of its proper divisors (12359074).

21010334 is a wasteful number, since it uses less digits than its factorization.

21010334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617970.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 21010334 is about 4583.7030881155. The cubic root of 21010334 is about 275.9376653318.

Adding to 21010334 its reverse (43301012), we get a palindrome (64311346).

The spelling of 21010334 in words is "twenty-one million, ten thousand, three hundred thirty-four".