20351213202052 has 24 divisors (see below), whose sum is σ = 37710791036856. Its totient is φ = 9576739258368.

The previous prime is 20351213202041. The next prime is 20351213202077. The reversal of 20351213202052 is 25020231215302.

It can be written as a sum of positive squares in 4 ways, for example, as 1498822341696 + 18852390860356 = 1224264^2 + 4341934^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20351213202052.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2544813 + ... + 6868660.

It is an arithmetic number, because the mean of its divisors is an integer number (1571282959869).

Almost surely, 2^{20351213202052} is an apocalyptic number.

It is an amenable number.

20351213202052 is a deficient number, since it is larger than the sum of its proper divisors (17359577834804).

20351213202052 is a wasteful number, since it uses less digits than its factorization.

20351213202052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9445287 (or 9445285 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 20351213202052 its reverse (25020231215302), we get a palindrome (45371444417354).

The spelling of 20351213202052 in words is "twenty trillion, three hundred fifty-one billion, two hundred thirteen million, two hundred two thousand, fifty-two".