21900725072557 has 8 divisors (see below), whose sum is σ = 22170186993600. Its totient is φ = 21631782848544.

The previous prime is 21900725072533. The next prime is 21900725072587. The reversal of 21900725072557 is 75527052700912.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21900725072557 - 2³⁵ = 21866365334189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21900725072587) 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 7 ways as a sum of consecutive naturals, for example, 129839457 + ... + 130008022.

It is an arithmetic number, because the mean of its divisors is an integer number (2771273374200).

Almost surely, 2^{21900725072557} is an apocalyptic number.

It is an amenable number.

21900725072557 is a deficient number, since it is larger than the sum of its proper divisors (269461921043).

21900725072557 is an equidigital number, since it uses as much as digits as its factorization.

21900725072557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259848515.

The product of its (nonzero) digits is 3087000, while the sum is 52.

The spelling of 21900725072557 in words is "twenty-one trillion, nine hundred billion, seven hundred twenty-five million, seventy-two thousand, five hundred fifty-seven".