20265200780 has 48 divisors (see below), whose sum is σ = 46836637344. Its totient is φ = 7303941120.

The previous prime is 20265200779. The next prime is 20265200789. The reversal of 20265200780 is 8700256202.

It is not an unprimeable number, because it can be changed into a prime (20265200789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 382727 + ... + 432446.

It is an arithmetic number, because the mean of its divisors is an integer number (975763278).

Almost surely, 2^20265200780 is an apocalyptic number.

20265200780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20265200780 is an abundant number, since it is smaller than the sum of its proper divisors (26571436564).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20265200780 is a wasteful number, since it uses less digits than its factorization.

20265200780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 815306 (or 815304 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

Adding to 20265200780 its reverse (8700256202), we get a palindrome (28965456982).

The spelling of 20265200780 in words is "twenty billion, two hundred sixty-five million, two hundred thousand, seven hundred eighty".