21436047360 has 1120 divisors, whose sum is σ = 95913683712. Its totient is φ = 4459069440.

The previous prime is 21436047349. The next prime is 21436047389. The reversal of 21436047360 is 6374063412.

It is a happy number.

21436047360 is a `hidden beast` number, since 2 + 1 + 43 + 604 + 7 + 3 + 6 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1120).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 301916125 + ... + 301916195.

Almost surely, 2^21436047360 is an apocalyptic number.

21436047360 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 21436047360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47956841856).

21436047360 is an abundant number, since it is smaller than the sum of its proper divisors (74477636352).

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

21436047360 is an equidigital number, since it uses as much as digits as its factorization.

21436047360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134 (or 101 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 36.

The spelling of 21436047360 in words is "twenty-one billion, four hundred thirty-six million, forty-seven thousand, three hundred sixty".