21488100361 has 8 divisors (see below), whose sum is σ = 26446892864. Its totient is φ = 17001573840.

The previous prime is 21488100307. The next prime is 21488100377. The reversal of 21488100361 is 16300188412.

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

It is a cyclic number.

It is not a de Polignac number, because 21488100361 - 2⁷ = 21488100233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21488100061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118066395 + ... + 118066576.

It is an arithmetic number, because the mean of its divisors is an integer number (3305861608).

Almost surely, 2^21488100361 is an apocalyptic number.

It is an amenable number.

21488100361 is a deficient number, since it is larger than the sum of its proper divisors (4958792503).

21488100361 is a wasteful number, since it uses less digits than its factorization.

21488100361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236132991.

The product of its (nonzero) digits is 9216, while the sum is 34.

Adding to 21488100361 its reverse (16300188412), we get a palindrome (37788288773).

The spelling of 21488100361 in words is "twenty-one billion, four hundred eighty-eight million, one hundred thousand, three hundred sixty-one".