21711260078 has 16 divisors (see below), whose sum is σ = 32645880576. Its totient is φ = 10829331960.

The previous prime is 21711260057. The next prime is 21711260093. The reversal of 21711260078 is 87006211712.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1517225 + ... + 1531467.

It is an arithmetic number, because the mean of its divisors is an integer number (2040367536).

Almost surely, 2^21711260078 is an apocalyptic number.

21711260078 is a deficient number, since it is larger than the sum of its proper divisors (10934620498).

21711260078 is a wasteful number, since it uses less digits than its factorization.

21711260078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16039.

The product of its (nonzero) digits is 9408, while the sum is 35.

The spelling of 21711260078 in words is "twenty-one billion, seven hundred eleven million, two hundred sixty thousand, seventy-eight".