21410130440 has 32 divisors (see below), whose sum is σ = 49833927000. Its totient is φ = 8268739584.

The previous prime is 21410130437. The next prime is 21410130461. The reversal of 21410130440 is 4403101412.

It can be written as a sum of positive squares in 4 ways, for example, as 20833458244 + 576672196 = 144338^2 + 24014^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 9227345 + ... + 9229664.

Almost surely, 2^21410130440 is an apocalyptic number.

21410130440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21410130440 is an abundant number, since it is smaller than the sum of its proper divisors (28423796560).

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

21410130440 is a wasteful number, since it uses less digits than its factorization.

21410130440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18457049 (or 18457045 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21410130440 its reverse (4403101412), we get a palindrome (25813231852).

The spelling of 21410130440 in words is "twenty-one billion, four hundred ten million, one hundred thirty thousand, four hundred forty".