21885805455125 has 32 divisors (see below), whose sum is σ = 27484619894784. Its totient is φ = 17399130528000.

The previous prime is 21885805455119. The next prime is 21885805455167. The reversal of 21885805455125 is 52155450858812.

It is not a de Polignac number, because 21885805455125 - 2¹⁶ = 21885805389589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22856744 + ... + 23795006.

It is an arithmetic number, because the mean of its divisors is an integer number (858894371712).

Almost surely, 2^{21885805455125} is an apocalyptic number.

21885805455125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21885805455125 is a deficient number, since it is larger than the sum of its proper divisors (5598814439659).

21885805455125 is an equidigital number, since it uses as much as digits as its factorization.

21885805455125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 939446 (or 939436 counting only the distinct ones).

The product of its (nonzero) digits is 25600000, while the sum is 59.

The spelling of 21885805455125 in words is "twenty-one trillion, eight hundred eighty-five billion, eight hundred five million, four hundred fifty-five thousand, one hundred twenty-five".