21334506 has 32 divisors (see below), whose sum is σ = 44032896. Its totient is φ = 6888000.

The previous prime is 21334499. The next prime is 21334559. The reversal of 21334506 is 60543312.

It is a happy number.

It is a super-2 number, since 2×21334506² = 910322292528072, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25576 + ... + 26396.

It is an arithmetic number, because the mean of its divisors is an integer number (1376028).

Almost surely, 2^21334506 is an apocalyptic number.

21334506 is an abundant number, since it is smaller than the sum of its proper divisors (22698390).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21334506 is a wasteful number, since it uses less digits than its factorization.

21334506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 958.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 21334506 is about 4618.9290966630. The cubic root of 21334506 is about 277.3495914075.

Adding to 21334506 its reverse (60543312), we get a palindrome (81877818).

The spelling of 21334506 in words is "twenty-one million, three hundred thirty-four thousand, five hundred six".