21377277313 has 32 divisors (see below), whose sum is σ = 25021624320. Its totient is φ = 17886960000.

The previous prime is 21377277301. The next prime is 21377277319. The reversal of 21377277313 is 31377277312.

It is not a de Polignac number, because 21377277313 - 2⁵ = 21377277281 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21377277313.

It is not an unprimeable number, because it can be changed into a prime (21377277319) 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 31 ways as a sum of consecutive naturals, for example, 35569213 + ... + 35569813.

It is an arithmetic number, because the mean of its divisors is an integer number (781925760).

Almost surely, 2^21377277313 is an apocalyptic number.

It is an amenable number.

21377277313 is a deficient number, since it is larger than the sum of its proper divisors (3644347007).

21377277313 is a wasteful number, since it uses less digits than its factorization.

21377277313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1309.

The product of its digits is 259308, while the sum is 43.

Subtracting 21377277313 from its reverse (31377277312), we obtain a palindrome (9999999999).

The spelling of 21377277313 in words is "twenty-one billion, three hundred seventy-seven million, two hundred seventy-seven thousand, three hundred thirteen".