21889025105 has 8 divisors (see below), whose sum is σ = 26270642112. Its totient is φ = 17508678768.

The previous prime is 21889025077. The next prime is 21889025111. The reversal of 21889025105 is 50152098812.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21889025105 is a prime.

It is a super-2 number, since 2×21889025105² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 279347 + ... + 349016.

It is an arithmetic number, because the mean of its divisors is an integer number (3283830264).

Almost surely, 2^21889025105 is an apocalyptic number.

It is an amenable number.

21889025105 is a deficient number, since it is larger than the sum of its proper divisors (4381617007).

21889025105 is an equidigital number, since it uses as much as digits as its factorization.

21889025105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635335.

The product of its (nonzero) digits is 57600, while the sum is 41.

The spelling of 21889025105 in words is "twenty-one billion, eight hundred eighty-nine million, twenty-five thousand, one hundred five".