21140796 has 12 divisors (see below), whose sum is σ = 49328552. Its totient is φ = 7046928.

The previous prime is 21140783. The next prime is 21140807. The reversal of 21140796 is 69704112.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

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, 880855 + ... + 880878.

Almost surely, 2^21140796 is an apocalyptic number.

It is an amenable number.

21140796 is an abundant number, since it is smaller than the sum of its proper divisors (28187756).

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

21140796 is a wasteful number, since it uses less digits than its factorization.

21140796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1761740 (or 1761738 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 21140796 is about 4597.9121348717. The cubic root of 21140796 is about 276.5076249196.

The spelling of 21140796 in words is "twenty-one million, one hundred forty thousand, seven hundred ninety-six".