21134061481 has 8 divisors (see below), whose sum is σ = 23189188680. Its totient is φ = 19140281472.

The previous prime is 21134061457. The next prime is 21134061493. The reversal of 21134061481 is 18416043112.

It can be written as a sum of positive squares in 4 ways, for example, as 4445555625 + 16688505856 = 66675^2 + 129184^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-21134061481 is a prime.

It is a super-2 number, since 2×21134061481² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21134061401) 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 7 ways as a sum of consecutive naturals, for example, 15336076 + ... + 15337453.

It is an arithmetic number, because the mean of its divisors is an integer number (2898648585).

Almost surely, 2^21134061481 is an apocalyptic number.

It is an amenable number.

21134061481 is a deficient number, since it is larger than the sum of its proper divisors (2055127199).

21134061481 is a wasteful number, since it uses less digits than its factorization.

21134061481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30673595.

The product of its (nonzero) digits is 4608, while the sum is 31.

The spelling of 21134061481 in words is "twenty-one billion, one hundred thirty-four million, sixty-one thousand, four hundred eighty-one".