21196773 has 24 divisors (see below), whose sum is σ = 34915608. Its totient is φ = 12275712.

The previous prime is 21196771. The next prime is 21196781. The reversal of 21196773 is 37769112.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 101124 + 21095649 = 318^2 + 4593^2 .

It is not a de Polignac number, because 21196773 - 2¹ = 21196771 is a prime.

It is a super-2 number, since 2×21196773² = 898606371227058, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21196771) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3340 + ... + 7317.

It is an arithmetic number, because the mean of its divisors is an integer number (1454817).

Almost surely, 2^21196773 is an apocalyptic number.

It is an amenable number.

21196773 is a deficient number, since it is larger than the sum of its proper divisors (13718835).

21196773 is a wasteful number, since it uses less digits than its factorization.

21196773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10693 (or 10690 counting only the distinct ones).

The product of its digits is 15876, while the sum is 36.

The square root of 21196773 is about 4603.9953301453. The cubic root of 21196773 is about 276.7514572133.

The spelling of 21196773 in words is "twenty-one million, one hundred ninety-six thousand, seven hundred seventy-three".