21650152 has 16 divisors (see below), whose sum is σ = 41904000. Its totient is φ = 10475760.

The previous prime is 21650137. The next prime is 21650159. The reversal of 21650152 is 25105612.

It is not an unprimeable number, because it can be changed into a prime (21650159) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43402 + ... + 43897.

It is an arithmetic number, because the mean of its divisors is an integer number (2619000).

Almost surely, 2^21650152 is an apocalyptic number.

It is an amenable number.

21650152 is a deficient number, since it is larger than the sum of its proper divisors (20253848).

21650152 is a wasteful number, since it uses less digits than its factorization.

21650152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87336 (or 87332 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 21650152 is about 4652.9723833266. The cubic root of 21650152 is about 278.7107050456.

Adding to 21650152 its reverse (25105612), we get a palindrome (46755764).

The spelling of 21650152 in words is "twenty-one million, six hundred fifty thousand, one hundred fifty-two".