21230113040 has 40 divisors (see below), whose sum is σ = 50169204888. Its totient is φ = 8352829440.

The previous prime is 21230113031. The next prime is 21230113061. The reversal of 21230113040 is 4031103212.

It can be written as a sum of positive squares in 4 ways, for example, as 236421376 + 20993691664 = 15376^2 + 144892^2 .

It is a tau number, because it is divible by the number of its divisors (40).

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, 2170337 + ... + 2180096.

Almost surely, 2^21230113040 is an apocalyptic number.

21230113040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21230113040 is an abundant number, since it is smaller than the sum of its proper divisors (28939091848).

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

21230113040 is a wasteful number, since it uses less digits than its factorization.

21230113040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4350507 (or 4350501 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21230113040 its reverse (4031103212), we get a palindrome (25261216252).

The spelling of 21230113040 in words is "twenty-one billion, two hundred thirty million, one hundred thirteen thousand, forty".