21736152 has 48 divisors (see below), whose sum is σ = 61971000. Its totient is φ = 6863616.

The previous prime is 21736151. The next prime is 21736157. The reversal of 21736152 is 25163712.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21736151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6577 + ... + 9312.

Almost surely, 2^21736152 is an apocalyptic number.

It is an amenable number.

21736152 is an abundant number, since it is smaller than the sum of its proper divisors (40234848).

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

21736152 is a wasteful number, since it uses less digits than its factorization.

21736152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15920 (or 15913 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 21736152 is about 4662.2046287138. The cubic root of 21736152 is about 279.0792544721.

Adding to 21736152 its reverse (25163712), we get a palindrome (46899864).

The spelling of 21736152 in words is "twenty-one million, seven hundred thirty-six thousand, one hundred fifty-two".