21436244616 has 32 divisors (see below), whose sum is σ = 53599440960. Its totient is φ = 7144237632.

The previous prime is 21436244597. The next prime is 21436244663. The reversal of 21436244616 is 61644263412.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81826 + ... + 222638.

It is an arithmetic number, because the mean of its divisors is an integer number (1674982530).

Almost surely, 2^21436244616 is an apocalyptic number.

It is an amenable number.

21436244616 is an abundant number, since it is smaller than the sum of its proper divisors (32163196344).

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

21436244616 is a wasteful number, since it uses less digits than its factorization.

21436244616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147165 (or 147161 counting only the distinct ones).

The product of its digits is 165888, while the sum is 39.

The spelling of 21436244616 in words is "twenty-one billion, four hundred thirty-six million, two hundred forty-four thousand, six hundred sixteen".