22020761 has 4 divisors (see below), whose sum is σ = 25166592. Its totient is φ = 18874932.

The previous prime is 22020751. The next prime is 22020767. The reversal of 22020761 is 16702022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22020761 - 2¹⁰ = 22019737 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22020767) 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, 1572905 + ... + 1572918.

It is an arithmetic number, because the mean of its divisors is an integer number (6291648).

Almost surely, 2^22020761 is an apocalyptic number.

It is an amenable number.

22020761 is a deficient number, since it is larger than the sum of its proper divisors (3145831).

22020761 is an equidigital number, since it uses as much as digits as its factorization.

22020761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3145830.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 22020761 is about 4692.6283679831. The cubic root of 22020761 is about 280.2920464733.

Adding to 22020761 its reverse (16702022), we get a palindrome (38722783).

The spelling of 22020761 in words is "twenty-two million, twenty thousand, seven hundred sixty-one".