21252350 has 48 divisors (see below), whose sum is σ = 46309536. Its totient is φ = 7104000.

The previous prime is 21252349. The next prime is 21252353. The reversal of 21252350 is 5325212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21252353) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13610 + ... + 15090.

It is an arithmetic number, because the mean of its divisors is an integer number (964782).

Almost surely, 2^21252350 is an apocalyptic number.

21252350 is an abundant number, since it is smaller than the sum of its proper divisors (25057186).

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

21252350 is a wasteful number, since it uses less digits than its factorization.

21252350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1541 (or 1536 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 21252350 is about 4610.0271148877. The cubic root of 21252350 is about 276.9931228119.

Adding to 21252350 its reverse (5325212), we get a palindrome (26577562).

The spelling of 21252350 in words is "twenty-one million, two hundred fifty-two thousand, three hundred fifty".