21413306266 has 16 divisors (see below), whose sum is σ = 35190350208. Its totient is φ = 9691544800.

The previous prime is 21413306263. The next prime is 21413306269. The reversal of 21413306266 is 66260331412.

It is an interprime number because it is at equal distance from previous prime (21413306263) and next prime (21413306269).

It is not an unprimeable number, because it can be changed into a prime (21413306263) 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, 2083570 + ... + 2093821.

It is an arithmetic number, because the mean of its divisors is an integer number (2199396888).

Almost surely, 2^21413306266 is an apocalyptic number.

21413306266 is a deficient number, since it is larger than the sum of its proper divisors (13777043942).

21413306266 is a wasteful number, since it uses less digits than its factorization.

21413306266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4177637.

The product of its (nonzero) digits is 31104, while the sum is 34.

Adding to 21413306266 its reverse (66260331412), we get a palindrome (87673637678).

The spelling of 21413306266 in words is "twenty-one billion, four hundred thirteen million, three hundred six thousand, two hundred sixty-six".