21837013441 has 4 divisors (see below), whose sum is σ = 22786448832. Its totient is φ = 20887578052.

The previous prime is 21837013439. The next prime is 21837013463. The reversal of 21837013441 is 14431073812.

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 a cyclic number.

It is not a de Polignac number, because 21837013441 - 2¹ = 21837013439 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21837013397 and 21837013406.

It is not an unprimeable number, because it can be changed into a prime (21837013141) 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, 474717661 + ... + 474717706.

It is an arithmetic number, because the mean of its divisors is an integer number (5696612208).

Almost surely, 2^21837013441 is an apocalyptic number.

It is an amenable number.

21837013441 is a deficient number, since it is larger than the sum of its proper divisors (949435391).

21837013441 is an equidigital number, since it uses as much as digits as its factorization.

21837013441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 949435390.

The product of its (nonzero) digits is 16128, while the sum is 34.

The spelling of 21837013441 in words is "twenty-one billion, eight hundred thirty-seven million, thirteen thousand, four hundred forty-one".