21404472265540 has 192 divisors, whose sum is σ = 58138872067584. Its totient is φ = 6437795438592.

The previous prime is 21404472265513. The next prime is 21404472265591. The reversal of 21404472265540 is 4556227440412.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 800389 + ... + 6591628.

It is an arithmetic number, because the mean of its divisors is an integer number (302806625352).

Almost surely, 2^{21404472265540} is an apocalyptic number.

21404472265540 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 21404472265540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29069436033792).

21404472265540 is an abundant number, since it is smaller than the sum of its proper divisors (36734399802044).

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

21404472265540 is a wasteful number, since it uses less digits than its factorization.

21404472265540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7392126 (or 7392124 counting only the distinct ones).

The product of its (nonzero) digits is 2150400, while the sum is 46.

The spelling of 21404472265540 in words is "twenty-one trillion, four hundred four billion, four hundred seventy-two million, two hundred sixty-five thousand, five hundred forty".