20766249725 has 24 divisors (see below), whose sum is σ = 28000207872. Its totient is φ = 15186168000.

The previous prime is 20766249701. The next prime is 20766249727. The reversal of 20766249725 is 52794266702.

It is not a de Polignac number, because 20766249725 - 2²⁸ = 20497814269 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20766249727) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 276701 + ... + 343650.

It is an arithmetic number, because the mean of its divisors is an integer number (1166675328).

Almost surely, 2^20766249725 is an apocalyptic number.

20766249725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20766249725 is a deficient number, since it is larger than the sum of its proper divisors (7233958147).

20766249725 is a wasteful number, since it uses less digits than its factorization.

20766249725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620477 (or 620472 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 50.

The spelling of 20766249725 in words is "twenty billion, seven hundred sixty-six million, two hundred forty-nine thousand, seven hundred twenty-five".