21111573140 has 48 divisors (see below), whose sum is σ = 50681030400. Its totient is φ = 7236360192.

The previous prime is 21111573127. The next prime is 21111573163. The reversal of 21111573140 is 4137511112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 582881 + ... + 618039.

It is an arithmetic number, because the mean of its divisors is an integer number (1055854800).

Almost surely, 2^21111573140 is an apocalyptic number.

21111573140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21111573140 is an abundant number, since it is smaller than the sum of its proper divisors (29569457260).

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

21111573140 is a wasteful number, since it uses less digits than its factorization.

21111573140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39464 (or 39462 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 26.

The spelling of 21111573140 in words is "twenty-one billion, one hundred eleven million, five hundred seventy-three thousand, one hundred forty".