21825920188801 has 4 divisors (see below), whose sum is σ = 22774873240512. Its totient is φ = 20876967137092.

The previous prime is 21825920188781. The next prime is 21825920188883. The reversal of 21825920188801 is 10888102952812.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21825920188801 - 2¹¹ = 21825920186753 is a prime.

It is a super-2 number, since 2×21825920188801² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21825920188201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 474476525821 + ... + 474476525866.

It is an arithmetic number, because the mean of its divisors is an integer number (5693718310128).

Almost surely, 2^{21825920188801} is an apocalyptic number.

It is an amenable number.

21825920188801 is a deficient number, since it is larger than the sum of its proper divisors (948953051711).

21825920188801 is an equidigital number, since it uses as much as digits as its factorization.

21825920188801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 948953051710.

The product of its (nonzero) digits is 1474560, while the sum is 55.

The spelling of 21825920188801 in words is "twenty-one trillion, eight hundred twenty-five billion, nine hundred twenty million, one hundred eighty-eight thousand, eight hundred one".