21196043 has 4 divisors (see below), whose sum is σ = 23122968. Its totient is φ = 19269120.

The previous prime is 21196009. The next prime is 21196067. The reversal of 21196043 is 34069112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21196043 - 2¹⁰ = 21195019 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21196003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 963446 + ... + 963467.

It is an arithmetic number, because the mean of its divisors is an integer number (5780742).

Almost surely, 2^21196043 is an apocalyptic number.

21196043 is a deficient number, since it is larger than the sum of its proper divisors (1926925).

21196043 is a wasteful number, since it uses less digits than its factorization.

21196043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1926924.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 21196043 is about 4603.9160504944. The cubic root of 21196043 is about 276.7482801435.

The spelling of 21196043 in words is "twenty-one million, one hundred ninety-six thousand, forty-three".