21367272718 has 16 divisors (see below), whose sum is σ = 35443598256. Its totient is φ = 9579349440.

The previous prime is 21367272653. The next prime is 21367272733. The reversal of 21367272718 is 81727276312.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 6650721 + ... + 6653932.

It is an arithmetic number, because the mean of its divisors is an integer number (2215224891).

Almost surely, 2^21367272718 is an apocalyptic number.

21367272718 is a deficient number, since it is larger than the sum of its proper divisors (14076325538).

21367272718 is a wasteful number, since it uses less digits than its factorization.

21367272718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13304739.

The product of its digits is 395136, while the sum is 46.

The spelling of 21367272718 in words is "twenty-one billion, three hundred sixty-seven million, two hundred seventy-two thousand, seven hundred eighteen".