21141671513 has 2 divisors, whose sum is σ = 21141671514. Its totient is φ = 21141671512.

The previous prime is 21141671503. The next prime is 21141671527. The reversal of 21141671513 is 31517614112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12516463129 + 8625208384 = 111877^2 + 92872^2 .

It is a cyclic number.

It is not a de Polignac number, because 21141671513 - 2²² = 21137477209 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21141671513.

It is not a weakly prime, because it can be changed into another prime (21141671503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10570835756 + 10570835757.

It is an arithmetic number, because the mean of its divisors is an integer number (10570835757).

Almost surely, 2^21141671513 is an apocalyptic number.

It is an amenable number.

21141671513 is a deficient number, since it is larger than the sum of its proper divisors (1).

21141671513 is an equidigital number, since it uses as much as digits as its factorization.

21141671513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 32.

The spelling of 21141671513 in words is "twenty-one billion, one hundred forty-one million, six hundred seventy-one thousand, five hundred thirteen".