20143052564 has 24 divisors (see below), whose sum is σ = 35783946408. Its totient is φ = 9920102400.

The previous prime is 20143052563. The next prime is 20143052591. The reversal of 20143052564 is 46525034102.

It can be written as a sum of positive squares in 4 ways, for example, as 8815707664 + 11327344900 = 93892^2 + 106430^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20143052564.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20143052561) 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, 51197 + ... + 207140.

It is an arithmetic number, because the mean of its divisors is an integer number (1490997767).

Almost surely, 2^20143052564 is an apocalyptic number.

It is an amenable number.

20143052564 is a deficient number, since it is larger than the sum of its proper divisors (15640893844).

20143052564 is a wasteful number, since it uses less digits than its factorization.

20143052564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258635 (or 258633 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 32.

Adding to 20143052564 its reverse (46525034102), we get a palindrome (66668086666).

The spelling of 20143052564 in words is "twenty billion, one hundred forty-three million, fifty-two thousand, five hundred sixty-four".