20502646025 has 12 divisors (see below), whose sum is σ = 25854186000. Its totient is φ = 16124113680.

The previous prime is 20502646019. The next prime is 20502646061. The reversal of 20502646025 is 52064620502.

It is not a de Polignac number, because 20502646025 - 2⁴ = 20502646009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20502645982 and 20502646000.

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, 6948575 + ... + 6951524.

It is an arithmetic number, because the mean of its divisors is an integer number (2154515500).

Almost surely, 2^20502646025 is an apocalyptic number.

20502646025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20502646025 is a deficient number, since it is larger than the sum of its proper divisors (5351539975).

20502646025 is a wasteful number, since it uses less digits than its factorization.

20502646025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13900168 (or 13900163 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 32.

The spelling of 20502646025 in words is "twenty billion, five hundred two million, six hundred forty-six thousand, twenty-five".