21334650 has 24 divisors (see below), whose sum is σ = 52910304. Its totient is φ = 5689200.

The previous prime is 21334631. The next prime is 21334657. The reversal of 21334650 is 5643312.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21334650.

It is not an unprimeable number, because it can be changed into a prime (21334657) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 70966 + ... + 71265.

It is an arithmetic number, because the mean of its divisors is an integer number (2204596).

Almost surely, 2^21334650 is an apocalyptic number.

21334650 is an abundant number, since it is smaller than the sum of its proper divisors (31575654).

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

21334650 is a wasteful number, since it uses less digits than its factorization.

21334650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142246 (or 142241 counting only the distinct ones).

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

The square root of 21334650 is about 4618.9446846655. The cubic root of 21334650 is about 277.3502154084.

Adding to 21334650 its reverse (5643312), we get a palindrome (26977962).

The spelling of 21334650 in words is "twenty-one million, three hundred thirty-four thousand, six hundred fifty".