21941137 has 8 divisors (see below), whose sum is σ = 22514976. Its totient is φ = 21370272.

The previous prime is 21941131. The next prime is 21941141. The reversal of 21941137 is 73114912.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21941137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21941131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26118 + ... + 26944.

It is an arithmetic number, because the mean of its divisors is an integer number (2814372).

Almost surely, 2^21941137 is an apocalyptic number.

It is an amenable number.

21941137 is a deficient number, since it is larger than the sum of its proper divisors (573839).

21941137 is an equidigital number, since it uses as much as digits as its factorization.

21941137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1487.

The product of its digits is 1512, while the sum is 28.

The square root of 21941137 is about 4684.1367401048. The cubic root of 21941137 is about 279.9538061550.

The spelling of 21941137 in words is "twenty-one million, nine hundred forty-one thousand, one hundred thirty-seven".