20401024514525 has 12 divisors (see below), whose sum is σ = 25304438903700. Its totient is φ = 16316194769280.

The previous prime is 20401024514477. The next prime is 20401024514561. The reversal of 20401024514525 is 52541542010402.

It can be written as a sum of positive squares in 6 ways, for example, as 771632237476 + 19629392277049 = 878426^2 + 4430507^2 .

It is not a de Polignac number, because 20401024514525 - 2⁶ = 20401024514461 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 115531070 + ... + 115707519.

It is an arithmetic number, because the mean of its divisors is an integer number (2108703241975).

Almost surely, 2^{20401024514525} is an apocalyptic number.

20401024514525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20401024514525 is a deficient number, since it is larger than the sum of its proper divisors (4903414389175).

20401024514525 is a wasteful number, since it uses less digits than its factorization.

20401024514525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231242128 (or 231242123 counting only the distinct ones).

The product of its (nonzero) digits is 64000, while the sum is 35.

Adding to 20401024514525 its reverse (52541542010402), we get a palindrome (72942566524927).

The spelling of 20401024514525 in words is "twenty trillion, four hundred one billion, twenty-four million, five hundred fourteen thousand, five hundred twenty-five".