21772883 has 4 divisors (see below), whose sum is σ = 23752248. Its totient is φ = 19793520.

The previous prime is 21772853. The next prime is 21772897. The reversal of 21772883 is 38827712.

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

It is a cyclic number.

It is not a de Polignac number, because 21772883 - 2¹⁰ = 21771859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21772813) 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, 989666 + ... + 989687.

It is an arithmetic number, because the mean of its divisors is an integer number (5938062).

Almost surely, 2^21772883 is an apocalyptic number.

21772883 is a deficient number, since it is larger than the sum of its proper divisors (1979365).

21772883 is a wasteful number, since it uses less digits than its factorization.

21772883 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1979364.

The product of its digits is 37632, while the sum is 38.

The square root of 21772883 is about 4666.1421967188. The cubic root of 21772883 is about 279.2363673984.

The spelling of 21772883 in words is "twenty-one million, seven hundred seventy-two thousand, eight hundred eighty-three".