20022200891 has 16 divisors (see below), whose sum is σ = 26431142400. Its totient is φ = 14683966080.

The previous prime is 20022200819. The next prime is 20022200917. The reversal of 20022200891 is 19800222002.

It is not a de Polignac number, because 20022200891 - 2³⁰ = 18948459067 is a prime.

It is a super-2 number, since 2×20022200891² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20022200891.

It is not an unprimeable number, because it can be changed into a prime (20022800891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7646591 + ... + 7649208.

It is an arithmetic number, because the mean of its divisors is an integer number (1651946400).

Almost surely, 2^20022200891 is an apocalyptic number.

20022200891 is a deficient number, since it is larger than the sum of its proper divisors (6408941509).

20022200891 is a wasteful number, since it uses less digits than its factorization.

20022200891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15295834.

The product of its (nonzero) digits is 1152, while the sum is 26.

Adding to 20022200891 its reverse (19800222002), we get a palindrome (39822422893).

The spelling of 20022200891 in words is "twenty billion, twenty-two million, two hundred thousand, eight hundred ninety-one".