21324167140 has 12 divisors (see below), whose sum is σ = 44780751036. Its totient is φ = 8529666848.

The previous prime is 21324167131. The next prime is 21324167159. The reversal of 21324167140 is 4176142312.

It can be written as a sum of positive squares in 2 ways, for example, as 5651130276 + 15673036864 = 75174^2 + 125192^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 533104159 + ... + 533104198.

It is an arithmetic number, because the mean of its divisors is an integer number (3731729253).

Almost surely, 2^21324167140 is an apocalyptic number.

21324167140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21324167140 is an abundant number, since it is smaller than the sum of its proper divisors (23456583896).

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

21324167140 is a wasteful number, since it uses less digits than its factorization.

21324167140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1066208366 (or 1066208364 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The spelling of 21324167140 in words is "twenty-one billion, three hundred twenty-four million, one hundred sixty-seven thousand, one hundred forty".