20525315502544 has 20 divisors (see below), whose sum is σ = 39887943203680. Its totient is φ = 10231652740320.

The previous prime is 20525315502541. The next prime is 20525315502551. The reversal of 20525315502544 is 44520551352502.

It is a self number, because there is not a number n which added to its sum of digits gives 20525315502544.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20525315502541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1937807724 + ... + 1937818315.

It is an arithmetic number, because the mean of its divisors is an integer number (1994397160184).

Almost surely, 2^{20525315502544} is an apocalyptic number.

It is an amenable number.

20525315502544 is a deficient number, since it is larger than the sum of its proper divisors (19362627701136).

20525315502544 is a wasteful number, since it uses less digits than its factorization.

20525315502544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3875626378 (or 3875626372 counting only the distinct ones).

The product of its (nonzero) digits is 1200000, while the sum is 43.

The spelling of 20525315502544 in words is "twenty trillion, five hundred twenty-five billion, three hundred fifteen million, five hundred two thousand, five hundred forty-four".