20542221200 has 60 divisors (see below), whose sum is σ = 49679671488. Its totient is φ = 8162448000.

The previous prime is 20542221197. The next prime is 20542221209. The reversal of 20542221200 is 212224502.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (20542221209) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 109652 + ... + 230451.

Almost surely, 2^20542221200 is an apocalyptic number.

20542221200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20542221200 is an abundant number, since it is smaller than the sum of its proper divisors (29137450288).

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

20542221200 is a wasteful number, since it uses less digits than its factorization.

20542221200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340272 (or 340261 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

Adding to 20542221200 its reverse (212224502), we get a palindrome (20754445702).

It can be divided in two parts, 205422 and 21200, that added together give a palindrome (226622).

The spelling of 20542221200 in words is "twenty billion, five hundred forty-two million, two hundred twenty-one thousand, two hundred".