21140223024 has 40 divisors (see below), whose sum is σ = 54840775680. Its totient is φ = 7017252928.

The previous prime is 21140223017. The next prime is 21140223053. The reversal of 21140223024 is 42032204112.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 909912 + ... + 932855.

It is an arithmetic number, because the mean of its divisors is an integer number (1371019392).

Almost surely, 2^21140223024 is an apocalyptic number.

21140223024 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21140223024 is an abundant number, since it is smaller than the sum of its proper divisors (33700552656).

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

21140223024 is a wasteful number, since it uses less digits than its factorization.

21140223024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1843017 (or 1843011 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 21140223024 its reverse (42032204112), we get a palindrome (63172427136).

The spelling of 21140223024 in words is "twenty-one billion, one hundred forty million, two hundred twenty-three thousand, twenty-four".