21277730711 has 16 divisors (see below), whose sum is σ = 22055844480. Its totient is φ = 20510910720.

The previous prime is 21277730707. The next prime is 21277730717. The reversal of 21277730711 is 11703777212.

It is a cyclic number.

It is not a de Polignac number, because 21277730711 - 2² = 21277730707 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21277730717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2738450 + ... + 2746208.

It is an arithmetic number, because the mean of its divisors is an integer number (1378490280).

Almost surely, 2^21277730711 is an apocalyptic number.

21277730711 is a deficient number, since it is larger than the sum of its proper divisors (778113769).

21277730711 is a wasteful number, since it uses less digits than its factorization.

21277730711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8474.

The product of its (nonzero) digits is 28812, while the sum is 38.

The spelling of 21277730711 in words is "twenty-one billion, two hundred seventy-seven million, seven hundred thirty thousand, seven hundred eleven".