21459041266 has 16 divisors (see below), whose sum is σ = 35181990144. Its totient is φ = 9756348624.

The previous prime is 21459041249. The next prime is 21459041267. The reversal of 21459041266 is 66214095412.

It is not an unprimeable number, because it can be changed into a prime (21459041267) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6157570 + ... + 6161053.

It is an arithmetic number, because the mean of its divisors is an integer number (2198874384).

Almost surely, 2^21459041266 is an apocalyptic number.

21459041266 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

21459041266 is a deficient number, since it is larger than the sum of its proper divisors (13722948878).

21459041266 is a wasteful number, since it uses less digits than its factorization.

21459041266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12318705.

The product of its (nonzero) digits is 103680, while the sum is 40.

The spelling of 21459041266 in words is "twenty-one billion, four hundred fifty-nine million, forty-one thousand, two hundred sixty-six".