21341873 has 16 divisors (see below), whose sum is σ = 24984960. Its totient is φ = 17853696.

The previous prime is 21341867. The next prime is 21341897. The reversal of 21341873 is 37814312.

It is not a de Polignac number, because 21341873 - 2¹² = 21337777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21341833) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63161 + ... + 63497.

It is an arithmetic number, because the mean of its divisors is an integer number (1561560).

Almost surely, 2^21341873 is an apocalyptic number.

It is an amenable number.

21341873 is a deficient number, since it is larger than the sum of its proper divisors (3643087).

21341873 is a wasteful number, since it uses less digits than its factorization.

21341873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536.

The product of its digits is 4032, while the sum is 29.

The square root of 21341873 is about 4619.7265070565. The cubic root of 21341873 is about 277.3815115170.

The spelling of 21341873 in words is "twenty-one million, three hundred forty-one thousand, eight hundred seventy-three".