21837389053 has 4 divisors (see below), whose sum is σ = 22302014400. Its totient is φ = 21372763708.

The previous prime is 21837389039. The next prime is 21837389081. The reversal of 21837389053 is 35098373812.

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 21837389053 - 2²¹ = 21835291901 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21837388988 and 21837389006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21837389033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 232312603 + ... + 232312696.

It is an arithmetic number, because the mean of its divisors is an integer number (5575503600).

Almost surely, 2^21837389053 is an apocalyptic number.

It is an amenable number.

21837389053 is a deficient number, since it is larger than the sum of its proper divisors (464625347).

21837389053 is an equidigital number, since it uses as much as digits as its factorization.

21837389053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464625346.

The product of its (nonzero) digits is 1088640, while the sum is 49.

The spelling of 21837389053 in words is "twenty-one billion, eight hundred thirty-seven million, three hundred eighty-nine thousand, fifty-three".