21349999596 has 48 divisors (see below), whose sum is σ = 52070667264. Its totient is φ = 6795714816.

The previous prime is 21349999589. The next prime is 21349999597. The reversal of 21349999596 is 69599994312.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21349999597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98445 + ... + 228891.

It is an arithmetic number, because the mean of its divisors is an integer number (1084805568).

Almost surely, 2^21349999596 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 21349999596, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26035333632).

21349999596 is an abundant number, since it is smaller than the sum of its proper divisors (30720667668).

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

21349999596 is a wasteful number, since it uses less digits than its factorization.

21349999596 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131070 (or 131068 counting only the distinct ones).

The product of its digits is 42515280, while the sum is 66.

The spelling of 21349999596 in words is "twenty-one billion, three hundred forty-nine million, nine hundred ninety-nine thousand, five hundred ninety-six".