21302148361 has 8 divisors (see below), whose sum is σ = 22984814664. Its totient is φ = 19625773440.

The previous prime is 21302148359. The next prime is 21302148379. The reversal of 21302148361 is 16384120312.

It can be written as a sum of positive squares in 4 ways, for example, as 2534518336 + 18767630025 = 50344^2 + 136995^2 .

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

It is not a de Polignac number, because 21302148361 - 2¹ = 21302148359 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21302148341) 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, 1565806 + ... + 1579351.

It is an arithmetic number, because the mean of its divisors is an integer number (2873101833).

Almost surely, 2^21302148361 is an apocalyptic number.

It is an amenable number.

21302148361 is a deficient number, since it is larger than the sum of its proper divisors (1682666303).

21302148361 is a wasteful number, since it uses less digits than its factorization.

21302148361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3145691.

The product of its (nonzero) digits is 6912, while the sum is 31.

Adding to 21302148361 its reverse (16384120312), we get a palindrome (37686268673).

The spelling of 21302148361 in words is "twenty-one billion, three hundred two million, one hundred forty-eight thousand, three hundred sixty-one".