21676952 has 16 divisors (see below), whose sum is σ = 44339400. Its totient is φ = 9853120.

The previous prime is 21676943. The next prime is 21676957. The reversal of 21676952 is 25967612.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21676957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123077 + ... + 123252.

Almost surely, 2^21676952 is an apocalyptic number.

21676952 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21676952 is an abundant number, since it is smaller than the sum of its proper divisors (22662448).

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

21676952 is a wasteful number, since it uses less digits than its factorization.

21676952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246346 (or 246342 counting only the distinct ones).

The product of its digits is 45360, while the sum is 38.

The square root of 21676952 is about 4655.8513721982. The cubic root of 21676952 is about 278.8256598498.

It can be divided in two parts, 2167 and 6952, that added together give a palindrome (9119).

The spelling of 21676952 in words is "twenty-one million, six hundred seventy-six thousand, nine hundred fifty-two".