21377416141 has 4 divisors (see below), whose sum is σ = 21670257532. Its totient is φ = 21084574752.

The previous prime is 21377416129. The next prime is 21377416169. The reversal of 21377416141 is 14161477312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11782234116 + 9595182025 = 108546^2 + 97955^2 .

It is a cyclic number.

It is not a de Polignac number, because 21377416141 - 2¹⁹ = 21376891853 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21377416141.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21377426141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146420586 + ... + 146420731.

It is an arithmetic number, because the mean of its divisors is an integer number (5417564383).

Almost surely, 2^21377416141 is an apocalyptic number.

It is an amenable number.

21377416141 is a deficient number, since it is larger than the sum of its proper divisors (292841391).

21377416141 is an equidigital number, since it uses as much as digits as its factorization.

21377416141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292841390.

The product of its digits is 28224, while the sum is 37.

The spelling of 21377416141 in words is "twenty-one billion, three hundred seventy-seven million, four hundred sixteen thousand, one hundred forty-one".