21772933 has 8 divisors (see below), whose sum is σ = 26797568. Its totient is φ = 17226864.

The previous prime is 21772901. The next prime is 21772951. The reversal of 21772933 is 33927712.

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

It is a cyclic number.

It is not a de Polignac number, because 21772933 - 2⁵ = 21772901 is a prime.

It is a super-2 number, since 2×21772933² = 948121222844978, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21772963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119541 + ... + 119722.

It is an arithmetic number, because the mean of its divisors is an integer number (3349696).

Almost surely, 2^21772933 is an apocalyptic number.

It is an amenable number.

21772933 is a deficient number, since it is larger than the sum of its proper divisors (5024635).

21772933 is a wasteful number, since it uses less digits than its factorization.

21772933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239283.

The product of its digits is 15876, while the sum is 34.

The square root of 21772933 is about 4666.1475544607. The cubic root of 21772933 is about 279.2365811476.

The spelling of 21772933 in words is "twenty-one million, seven hundred seventy-two thousand, nine hundred thirty-three".