21527796 has 12 divisors (see below), whose sum is σ = 50231552. Its totient is φ = 7175928.

The previous prime is 21527791. The next prime is 21527813. The reversal of 21527796 is 69772512.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21527791) 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 3 ways as a sum of consecutive naturals, for example, 896980 + ... + 897003.

Almost surely, 2^21527796 is an apocalyptic number.

It is an amenable number.

21527796 is an abundant number, since it is smaller than the sum of its proper divisors (28703756).

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

21527796 is a wasteful number, since it uses less digits than its factorization.

21527796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1793990 (or 1793988 counting only the distinct ones).

The product of its digits is 52920, while the sum is 39.

The square root of 21527796 is about 4639.8055993759. The cubic root of 21527796 is about 278.1846676006.

The spelling of 21527796 in words is "twenty-one million, five hundred twenty-seven thousand, seven hundred ninety-six".