21936076 has 6 divisors (see below), whose sum is σ = 38388140. Its totient is φ = 10968036.

The previous prime is 21936067. The next prime is 21936077. The reversal of 21936076 is 67063912.

It is not an unprimeable number, because it can be changed into a prime (21936077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2742006 + ... + 2742013.

Almost surely, 2^21936076 is an apocalyptic number.

It is an amenable number.

21936076 is a deficient number, since it is larger than the sum of its proper divisors (16452064).

21936076 is a wasteful number, since it uses less digits than its factorization.

21936076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5484023 (or 5484021 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 21936076 is about 4683.5964813378. The cubic root of 21936076 is about 279.9322795409.

Adding to 21936076 its reverse (67063912), we get a palindrome (88999988).

The spelling of 21936076 in words is "twenty-one million, nine hundred thirty-six thousand, seventy-six".