21534202 has 16 divisors (see below), whose sum is σ = 32959872. Its totient is φ = 10549440.

The previous prime is 21534199. The next prime is 21534209. The reversal of 21534202 is 20243512.

It is a self number, because there is not a number n which added to its sum of digits gives 21534202.

It is not an unprimeable number, because it can be changed into a prime (21534209) 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 7 ways as a sum of consecutive naturals, for example, 36018 + ... + 36610.

It is an arithmetic number, because the mean of its divisors is an integer number (2059992).

Almost surely, 2^21534202 is an apocalyptic number.

21534202 is a deficient number, since it is larger than the sum of its proper divisors (11425670).

21534202 is a wasteful number, since it uses less digits than its factorization.

21534202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 933.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 21534202 is about 4640.4958786750. The cubic root of 21534202 is about 278.2122578882.

Adding to 21534202 its reverse (20243512), we get a palindrome (41777714).

It can be divided in two parts, 21534 and 202, that added together give a triangular number (21736 = T₂₀₈).

The spelling of 21534202 in words is "twenty-one million, five hundred thirty-four thousand, two hundred two".