20213145552220 has 48 divisors (see below), whose sum is σ = 42497673704640. Its totient is φ = 8075723894784.

The previous prime is 20213145552191. The next prime is 20213145552253. The reversal of 20213145552220 is 2225554131202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 139736572 + ... + 139881148.

It is an arithmetic number, because the mean of its divisors is an integer number (885368202180).

Almost surely, 2^{20213145552220} is an apocalyptic number.

20213145552220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20213145552220 is an abundant number, since it is smaller than the sum of its proper divisors (22284528152420).

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

20213145552220 is a wasteful number, since it uses less digits than its factorization.

20213145552220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152782 (or 152780 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 34.

Adding to 20213145552220 its reverse (2225554131202), we get a palindrome (22438699683422).

The spelling of 20213145552220 in words is "twenty trillion, two hundred thirteen billion, one hundred forty-five million, five hundred fifty-two thousand, two hundred twenty".