21111567160 has 32 divisors (see below), whose sum is σ = 48511690560. Its totient is φ = 8264953216.

The previous prime is 21111567151. The next prime is 21111567161. The reversal of 21111567160 is 6176511112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21111567161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5612899 + ... + 5616658.

It is an arithmetic number, because the mean of its divisors is an integer number (1515990330).

Almost surely, 2^21111567160 is an apocalyptic number.

21111567160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21111567160 is an abundant number, since it is smaller than the sum of its proper divisors (27400123400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21111567160 is a wasteful number, since it uses less digits than its factorization.

21111567160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11229615 (or 11229611 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 31.

The spelling of 21111567160 in words is "twenty-one billion, one hundred eleven million, five hundred sixty-seven thousand, one hundred sixty".