21864274041 has 4 divisors (see below), whose sum is σ = 29152365392. Its totient is φ = 14576182692.

The previous prime is 21864274031. The next prime is 21864274093. The reversal of 21864274041 is 14047246812.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 21864274041 - 2⁷ = 21864273913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21864274031) 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, 3644045671 + ... + 3644045676.

It is an arithmetic number, because the mean of its divisors is an integer number (7288091348).

Almost surely, 2^21864274041 is an apocalyptic number.

It is an amenable number.

21864274041 is a deficient number, since it is larger than the sum of its proper divisors (7288091351).

21864274041 is an equidigital number, since it uses as much as digits as its factorization.

21864274041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7288091350.

The product of its (nonzero) digits is 86016, while the sum is 39.

The spelling of 21864274041 in words is "twenty-one billion, eight hundred sixty-four million, two hundred seventy-four thousand, forty-one".