21377277319 has 2 divisors, whose sum is σ = 21377277320. Its totient is φ = 21377277318.

The previous prime is 21377277301. The next prime is 21377277349. The reversal of 21377277319 is 91377277312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21377277319 - 2¹³ = 21377269127 is a prime.

It is a super-2 number, since 2×21377277319² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21377277349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10688638659 + 10688638660.

It is an arithmetic number, because the mean of its divisors is an integer number (10688638660).

Almost surely, 2^21377277319 is an apocalyptic number.

21377277319 is a deficient number, since it is larger than the sum of its proper divisors (1).

21377277319 is an equidigital number, since it uses as much as digits as its factorization.

21377277319 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 777924, while the sum is 49.

The spelling of 21377277319 in words is "twenty-one billion, three hundred seventy-seven million, two hundred seventy-seven thousand, three hundred nineteen".