20003513165625 has 72 divisors (see below), whose sum is σ = 36643211184384. Its totient is φ = 9698672500000.

The previous prime is 20003513165617. The next prime is 20003513165651. The reversal of 20003513165625 is 52656131530002.

It is not a de Polignac number, because 20003513165625 - 2³ = 20003513165617 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 7682601 + ... + 9951350.

It is an arithmetic number, because the mean of its divisors is an integer number (508933488672).

Almost surely, 2^{20003513165625} is an apocalyptic number.

20003513165625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20003513165625 is a deficient number, since it is larger than the sum of its proper divisors (16639698018759).

20003513165625 is an equidigital number, since it uses as much as digits as its factorization.

20003513165625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17634001 (or 17633970 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 39.

Adding to 20003513165625 its reverse (52656131530002), we get a palindrome (72659644695627).

The spelling of 20003513165625 in words is "twenty trillion, three billion, five hundred thirteen million, one hundred sixty-five thousand, six hundred twenty-five".