21864139341 has 8 divisors (see below), whose sum is σ = 31802384544. Its totient is φ = 13250993520.

The previous prime is 21864139313. The next prime is 21864139361. The reversal of 21864139341 is 14393146812.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21864139341 - 2⁶ = 21864139277 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21864139293 and 21864139302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21864139301) 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, 331274806 + ... + 331274871.

It is an arithmetic number, because the mean of its divisors is an integer number (3975298068).

Almost surely, 2^21864139341 is an apocalyptic number.

It is an amenable number.

21864139341 is a deficient number, since it is larger than the sum of its proper divisors (9938245203).

21864139341 is a wasteful number, since it uses less digits than its factorization.

21864139341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662549691.

The product of its digits is 124416, while the sum is 42.

The spelling of 21864139341 in words is "twenty-one billion, eight hundred sixty-four million, one hundred thirty-nine thousand, three hundred forty-one".