21741658863 has 4 divisors (see below), whose sum is σ = 28988878488. Its totient is φ = 14494439240.

The previous prime is 21741658859. The next prime is 21741658871. The reversal of 21741658863 is 36885614712.

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

It is a cyclic number.

It is not a de Polignac number, because 21741658863 - 2² = 21741658859 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21741658843) 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, 3623609808 + ... + 3623609813.

It is an arithmetic number, because the mean of its divisors is an integer number (7247219622).

Almost surely, 2^21741658863 is an apocalyptic number.

21741658863 is a deficient number, since it is larger than the sum of its proper divisors (7247219625).

21741658863 is an equidigital number, since it uses as much as digits as its factorization.

21741658863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7247219624.

The product of its digits is 1935360, while the sum is 51.

The spelling of 21741658863 in words is "twenty-one billion, seven hundred forty-one million, six hundred fifty-eight thousand, eight hundred sixty-three".