21364084241 has 4 divisors (see below), whose sum is σ = 21474779172. Its totient is φ = 21253389312.

The previous prime is 21364084219. The next prime is 21364084283. The reversal of 21364084241 is 14248046312.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11264638225 + 10099446016 = 106135^2 + 100496^2 .

It is a cyclic number.

It is not a de Polignac number, because 21364084241 - 2²⁶ = 21296975377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21364084541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55347176 + ... + 55347561.

It is an arithmetic number, because the mean of its divisors is an integer number (5368694793).

Almost surely, 2^21364084241 is an apocalyptic number.

It is an amenable number.

21364084241 is a deficient number, since it is larger than the sum of its proper divisors (110694931).

21364084241 is a wasteful number, since it uses less digits than its factorization.

21364084241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110694930.

The product of its (nonzero) digits is 36864, while the sum is 35.

The spelling of 21364084241 in words is "twenty-one billion, three hundred sixty-four million, eighty-four thousand, two hundred forty-one".