21130223040 has 336 divisors, whose sum is σ = 73947893760. Its totient is φ = 5537372160.

The previous prime is 21130222999. The next prime is 21130223063. The reversal of 21130223040 is 4032203112.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 58858381 + ... + 58858739.

Almost surely, 2^21130223040 is an apocalyptic number.

21130223040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21130223040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36973946880).

21130223040 is an abundant number, since it is smaller than the sum of its proper divisors (52817670720).

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

21130223040 is a wasteful number, since it uses less digits than its factorization.

21130223040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680 (or 667 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21130223040 its reverse (4032203112), we get a palindrome (25162426152).

The spelling of 21130223040 in words is "twenty-one billion, one hundred thirty million, two hundred twenty-three thousand, forty".