20253641257320 has 64 divisors (see below), whose sum is σ = 61616711456640. Its totient is φ = 5324900985600.

The previous prime is 20253641257319. The next prime is 20253641257321. The reversal of 20253641257320 is 2375214635202.

It is an interprime number because it is at equal distance from previous prime (20253641257319) and next prime (20253641257321).

It is not an unprimeable number, because it can be changed into a prime (20253641257321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1188585451 + ... + 1188602490.

It is an arithmetic number, because the mean of its divisors is an integer number (962761116510).

Almost surely, 2^{20253641257320} is an apocalyptic number.

20253641257320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20253641257320 is an abundant number, since it is smaller than the sum of its proper divisors (41363070199320).

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

20253641257320 is a wasteful number, since it uses less digits than its factorization.

20253641257320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2377188026 (or 2377188022 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 42.

The spelling of 20253641257320 in words is "twenty trillion, two hundred fifty-three billion, six hundred forty-one million, two hundred fifty-seven thousand, three hundred twenty".