21302834 has 16 divisors (see below), whose sum is σ = 36590400. Its totient is φ = 9111984.

The previous prime is 21302833. The next prime is 21302837. The reversal of 21302834 is 43820312.

It is not an unprimeable number, because it can be changed into a prime (21302833) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8072 + ... + 10380.

It is an arithmetic number, because the mean of its divisors is an integer number (2286900).

Almost surely, 2^21302834 is an apocalyptic number.

21302834 is a deficient number, since it is larger than the sum of its proper divisors (15287566).

21302834 is a wasteful number, since it uses less digits than its factorization.

21302834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2977.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 21302834 is about 4615.4993229335. The cubic root of 21302834 is about 277.2122776008.

The spelling of 21302834 in words is "twenty-one million, three hundred two thousand, eight hundred thirty-four".