21409175933740 has 96 divisors (see below), whose sum is σ = 54505060251264. Its totient is φ = 6895736893440.

The previous prime is 21409175933729. The next prime is 21409175933741. The reversal of 21409175933740 is 4733957190412.

It is not an unprimeable number, because it can be changed into a prime (21409175933741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7026147 + ... + 9601306.

It is an arithmetic number, because the mean of its divisors is an integer number (567761044284).

Almost surely, 2^{21409175933740} is an apocalyptic number.

21409175933740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21409175933740 is an abundant number, since it is smaller than the sum of its proper divisors (33095884317524).

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

21409175933740 is a wasteful number, since it uses less digits than its factorization.

21409175933740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16628027 (or 16628025 counting only the distinct ones).

The product of its (nonzero) digits is 5715360, while the sum is 55.

The spelling of 21409175933740 in words is "twenty-one trillion, four hundred nine billion, one hundred seventy-five million, nine hundred thirty-three thousand, seven hundred forty".