21341545040 has 20 divisors (see below), whose sum is σ = 49619092404. Its totient is φ = 8536617984.

The previous prime is 21341545007. The next prime is 21341545087. The reversal of 21341545040 is 4054514312.

It can be written as a sum of positive squares in 2 ways, for example, as 4593043984 + 16748501056 = 67772^2 + 129416^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 21341544994 and 21341545012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133384577 + ... + 133384736.

Almost surely, 2^21341545040 is an apocalyptic number.

21341545040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21341545040 is an abundant number, since it is smaller than the sum of its proper divisors (28277547364).

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

21341545040 is a wasteful number, since it uses less digits than its factorization.

21341545040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266769326 (or 266769320 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

The spelling of 21341545040 in words is "twenty-one billion, three hundred forty-one million, five hundred forty-five thousand, forty".