20261272755225 has 48 divisors (see below), whose sum is σ = 33664021739712. Its totient is φ = 10752783586560.

The previous prime is 20261272755137. The next prime is 20261272755233. The reversal of 20261272755225 is 52255727216202.

It is not a de Polignac number, because 20261272755225 - 2²⁴ = 20261255978009 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12628479 + ... + 14142171.

It is an arithmetic number, because the mean of its divisors is an integer number (701333786244).

Almost surely, 2^{20261272755225} is an apocalyptic number.

20261272755225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20261272755225 is a deficient number, since it is larger than the sum of its proper divisors (13402748984487).

20261272755225 is a wasteful number, since it uses less digits than its factorization.

20261272755225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1514586 (or 1514581 counting only the distinct ones).

The product of its (nonzero) digits is 2352000, while the sum is 48.

The spelling of 20261272755225 in words is "twenty trillion, two hundred sixty-one billion, two hundred seventy-two million, seven hundred fifty-five thousand, two hundred twenty-five".