21220206162 has 16 divisors (see below), whose sum is σ = 42497850720. Its totient is φ = 7063828992.

The previous prime is 21220206143. The next prime is 21220206169. The reversal of 21220206162 is 26160202212.

It is a happy number.

It is a super-3 number, since 3×21220206162³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (21220206169) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2388463 + ... + 2397330.

It is an arithmetic number, because the mean of its divisors is an integer number (2656115670).

Almost surely, 2^21220206162 is an apocalyptic number.

21220206162 is an abundant number, since it is smaller than the sum of its proper divisors (21277644558).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21220206162 is a wasteful number, since it uses less digits than its factorization.

21220206162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4786537.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 21220206162 its reverse (26160202212), we get a palindrome (47380408374).

The spelling of 21220206162 in words is "twenty-one billion, two hundred twenty million, two hundred six thousand, one hundred sixty-two".