20401107007525 has 6 divisors (see below), whose sum is σ = 25297372689362. Its totient is φ = 16320885606000.

The previous prime is 20401107007517. The next prime is 20401107007597. The reversal of 20401107007525 is 52570070110402.

It can be written as a sum of positive squares in 3 ways, for example, as 3120674170849 + 17280432836676 = 1766543^2 + 4156974^2 .

It is not a de Polignac number, because 20401107007525 - 2³ = 20401107007517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 408022140126 + ... + 408022140175.

Almost surely, 2^{20401107007525} is an apocalyptic number.

20401107007525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20401107007525 is a deficient number, since it is larger than the sum of its proper divisors (4896265681837).

20401107007525 is an equidigital number, since it uses as much as digits as its factorization.

20401107007525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 816044280311 (or 816044280306 counting only the distinct ones).

The product of its (nonzero) digits is 19600, while the sum is 34.

Adding to 20401107007525 its reverse (52570070110402), we get a palindrome (72971177117927).

The spelling of 20401107007525 in words is "twenty trillion, four hundred one billion, one hundred seven million, seven thousand, five hundred twenty-five".