21151453163 has 12 divisors (see below), whose sum is σ = 22336295688. Its totient is φ = 20026535040.

The previous prime is 21151453129. The next prime is 21151453181. The reversal of 21151453163 is 36135415112.

It is a de Polignac number, because none of the positive numbers 2^k-21151453163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21151453123) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 637595 + ... + 669947.

It is an arithmetic number, because the mean of its divisors is an integer number (1861357974).

Almost surely, 2^21151453163 is an apocalyptic number.

21151453163 is a deficient number, since it is larger than the sum of its proper divisors (1184842525).

21151453163 is a wasteful number, since it uses less digits than its factorization.

21151453163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34202 (or 34183 counting only the distinct ones).

The product of its digits is 10800, while the sum is 32.

Adding to 21151453163 its reverse (36135415112), we get a palindrome (57286868275).

The spelling of 21151453163 in words is "twenty-one billion, one hundred fifty-one million, four hundred fifty-three thousand, one hundred sixty-three".