20220869 has 2 divisors, whose sum is σ = 20220870. Its totient is φ = 20220868.

The previous prime is 20220839. The next prime is 20220877. The reversal of 20220869 is 96802202.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19918369 + 302500 = 4463^2 + 550^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20220869 is a prime.

It is a super-2 number, since 2×20220869² = 817767086230322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20220839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10110434 + 10110435.

It is an arithmetic number, because the mean of its divisors is an integer number (10110435).

Almost surely, 2^20220869 is an apocalyptic number.

It is an amenable number.

20220869 is a deficient number, since it is larger than the sum of its proper divisors (1).

20220869 is an equidigital number, since it uses as much as digits as its factorization.

20220869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 20220869 is about 4496.7620573030. The cubic root of 20220869 is about 272.4373236320.

The spelling of 20220869 in words is "twenty million, two hundred twenty thousand, eight hundred sixty-nine".