21962841 has 16 divisors (see below), whose sum is σ = 30926400. Its totient is φ = 13825728.

The previous prime is 21962833. The next prime is 21962851. The reversal of 21962841 is 14826912.

It is not a de Polignac number, because 21962841 - 2³ = 21962833 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21962851) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 28635 + ... + 29391.

It is an arithmetic number, because the mean of its divisors is an integer number (1932900).

Almost surely, 2^21962841 is an apocalyptic number.

It is an amenable number.

21962841 is a deficient number, since it is larger than the sum of its proper divisors (8963559).

21962841 is a wasteful number, since it uses less digits than its factorization.

21962841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1288.

The product of its digits is 6912, while the sum is 33.

The square root of 21962841 is about 4686.4529230539. The cubic root of 21962841 is about 280.0460851015.

The spelling of 21962841 in words is "twenty-one million, nine hundred sixty-two thousand, eight hundred forty-one".