21202018022 has 16 divisors (see below), whose sum is σ = 32036376960. Its totient is φ = 10523496192.

The previous prime is 21202018021. The next prime is 21202018051. The reversal of 21202018022 is 22081020212.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21202017985 and 21202018003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21202018021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90104 + ... + 224772.

It is an arithmetic number, because the mean of its divisors is an integer number (2002273560).

Almost surely, 2^21202018022 is an apocalyptic number.

21202018022 is a deficient number, since it is larger than the sum of its proper divisors (10834358938).

21202018022 is a wasteful number, since it uses less digits than its factorization.

21202018022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135247.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21202018022 its reverse (22081020212), we get a palindrome (43283038234).

The spelling of 21202018022 in words is "twenty-one billion, two hundred two million, eighteen thousand, twenty-two".