21450611105425 has 12 divisors (see below), whose sum is σ = 26973388164096. Its totient is φ = 16918791856400.

The previous prime is 21450611105401. The next prime is 21450611105447. The reversal of 21450611105425 is 52450111605412.

It is not a de Polignac number, because 21450611105425 - 2¹³ = 21450611097233 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6042423889 + ... + 6042427438.

It is an arithmetic number, because the mean of its divisors is an integer number (2247782347008).

Almost surely, 2^{21450611105425} is an apocalyptic number.

21450611105425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21450611105425 is a deficient number, since it is larger than the sum of its proper divisors (5522777058671).

21450611105425 is a wasteful number, since it uses less digits than its factorization.

21450611105425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12084851408 (or 12084851403 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 37.

The spelling of 21450611105425 in words is "twenty-one trillion, four hundred fifty billion, six hundred eleven million, one hundred five thousand, four hundred twenty-five".