21736104516 has 96 divisors (see below), whose sum is σ = 64673280000. Its totient is φ = 6184279584.

The previous prime is 21736104503. The next prime is 21736104517. The reversal of 21736104516 is 61540163712.

21736104516 is a `hidden beast` number, since 2 + 1 + 7 + 36 + 104 + 516 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (21736104517) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 120535 + ... + 240833.

It is an arithmetic number, because the mean of its divisors is an integer number (673680000).

Almost surely, 2^21736104516 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21736104516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32336640000).

21736104516 is an abundant number, since it is smaller than the sum of its proper divisors (42937175484).

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

21736104516 is a wasteful number, since it uses less digits than its factorization.

21736104516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120558 (or 120550 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The spelling of 21736104516 in words is "twenty-one billion, seven hundred thirty-six million, one hundred four thousand, five hundred sixteen".