21141916 has 24 divisors (see below), whose sum is σ = 38174976. Its totient is φ = 10239600.

The previous prime is 21141893. The next prime is 21141941. The reversal of 21141916 is 61914112.

It is a super-2 number, since 2×21141916² = 893961224302112, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 19591 + ... + 20641.

It is an arithmetic number, because the mean of its divisors is an integer number (1590624).

Almost surely, 2^21141916 is an apocalyptic number.

It is an amenable number.

21141916 is a deficient number, since it is larger than the sum of its proper divisors (17033060).

21141916 is a wasteful number, since it uses less digits than its factorization.

21141916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1209 (or 1207 counting only the distinct ones).

The product of its digits is 432, while the sum is 25.

The square root of 21141916 is about 4598.0339276695. The cubic root of 21141916 is about 276.5125077864.

The spelling of 21141916 in words is "twenty-one million, one hundred forty-one thousand, nine hundred sixteen".