21114773 has 4 divisors (see below), whose sum is σ = 21249420. Its totient is φ = 20980128.

The previous prime is 21114767. The next prime is 21114787. The reversal of 21114773 is 37741112.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 11242609 + 9872164 = 3353^2 + 3142^2 .

It is a cyclic number.

It is not a de Polignac number, because 21114773 - 2²⁰ = 20066197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21114173) 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, 67088 + ... + 67401.

It is an arithmetic number, because the mean of its divisors is an integer number (5312355).

Almost surely, 2^21114773 is an apocalyptic number.

It is an amenable number.

21114773 is a deficient number, since it is larger than the sum of its proper divisors (134647).

21114773 is a wasteful number, since it uses less digits than its factorization.

21114773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134646.

The product of its digits is 1176, while the sum is 26.

The square root of 21114773 is about 4595.0813920974. The cubic root of 21114773 is about 276.3941237948.

Adding to 21114773 its reverse (37741112), we get a palindrome (58855885).

The spelling of 21114773 in words is "twenty-one million, one hundred fourteen thousand, seven hundred seventy-three".