21362534 has 16 divisors (see below), whose sum is σ = 33785856. Its totient is φ = 10115400.

The previous prime is 21362533. The next prime is 21362567. The reversal of 21362534 is 43526312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21362533) 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, 752 + ... + 6579.

It is an arithmetic number, because the mean of its divisors is an integer number (2111616).

Almost surely, 2^21362534 is an apocalyptic number.

21362534 is a deficient number, since it is larger than the sum of its proper divisors (12423322).

21362534 is a wasteful number, since it uses less digits than its factorization.

21362534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7411.

The product of its digits is 4320, while the sum is 26.

The square root of 21362534 is about 4621.9621374477. The cubic root of 21362534 is about 277.4709933699.

Adding to 21362534 its reverse (43526312), we get a palindrome (64888846).

The spelling of 21362534 in words is "twenty-one million, three hundred sixty-two thousand, five hundred thirty-four".