21776613118 has 32 divisors (see below), whose sum is σ = 37488116736. Its totient is φ = 9409195488.

The previous prime is 21776613113. The next prime is 21776613119. The reversal of 21776613118 is 81131667712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21776613113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 359296 + ... + 415507.

It is an arithmetic number, because the mean of its divisors is an integer number (1171503648).

Almost surely, 2^21776613118 is an apocalyptic number.

21776613118 is a deficient number, since it is larger than the sum of its proper divisors (15711503618).

21776613118 is a wasteful number, since it uses less digits than its factorization.

21776613118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 774888.

The product of its digits is 84672, while the sum is 43.

The spelling of 21776613118 in words is "twenty-one billion, seven hundred seventy-six million, six hundred thirteen thousand, one hundred eighteen".