21144150355 has 16 divisors (see below), whose sum is σ = 26624090880. Its totient is φ = 16089465568.

The previous prime is 21144150353. The next prime is 21144150359. The reversal of 21144150355 is 55305144112.

It is a cyclic number.

It is not a de Polignac number, because 21144150355 - 2¹ = 21144150353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21144150353) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 492997 + ... + 534166.

It is an arithmetic number, because the mean of its divisors is an integer number (1664005680).

Almost surely, 2^21144150355 is an apocalyptic number.

21144150355 is a deficient number, since it is larger than the sum of its proper divisors (5479940525).

21144150355 is a wasteful number, since it uses less digits than its factorization.

21144150355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1027370.

The product of its (nonzero) digits is 12000, while the sum is 31.

Adding to 21144150355 its reverse (55305144112), we get a palindrome (76449294467).

The spelling of 21144150355 in words is "twenty-one billion, one hundred forty-four million, one hundred fifty thousand, three hundred fifty-five".