21041896 has 8 divisors (see below), whose sum is σ = 39453570. Its totient is φ = 10520944.

The previous prime is 21041879. The next prime is 21041981. The reversal of 21041896 is 69814012.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 14333796 + 6708100 = 3786^2 + 2590^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×21041896² = 885522774549632, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1315111 + ... + 1315126.

Almost surely, 2^21041896 is an apocalyptic number.

It is an amenable number.

21041896 is a deficient number, since it is larger than the sum of its proper divisors (18411674).

21041896 is a wasteful number, since it uses less digits than its factorization.

21041896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2630243 (or 2630239 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 21041896 is about 4587.1446456374. The cubic root of 21041896 is about 276.0757685978.

The spelling of 21041896 in words is "twenty-one million, forty-one thousand, eight hundred ninety-six".