20525215513120 has 24 divisors (see below), whose sum is σ = 48490821650124. Its totient is φ = 8210086205184.

The previous prime is 20525215513111. The next prime is 20525215513139. The reversal of 20525215513120 is 2131551252502.

It can be written as a sum of positive squares in 2 ways, for example, as 20288214011536 + 237001501584 = 4504244^2 + 486828^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64141298319 + ... + 64141298638.

Almost surely, 2^{20525215513120} is an apocalyptic number.

20525215513120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20525215513120 is an abundant number, since it is smaller than the sum of its proper divisors (27965606137004).

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

20525215513120 is a wasteful number, since it uses less digits than its factorization.

20525215513120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128282596972 (or 128282596964 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 34.

Adding to 20525215513120 its reverse (2131551252502), we get a palindrome (22656766765622).

The spelling of 20525215513120 in words is "twenty trillion, five hundred twenty-five billion, two hundred fifteen million, five hundred thirteen thousand, one hundred twenty".