21376824196 has 72 divisors (see below), whose sum is σ = 47424956544. Its totient is φ = 8250428160.

The previous prime is 21376824179. The next prime is 21376824251. The reversal of 21376824196 is 69142867312.

It is a happy number.

It is a super-2 number, since 2×21376824196² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 138921 + ... + 249103.

It is an arithmetic number, because the mean of its divisors is an integer number (658679952).

Almost surely, 2^21376824196 is an apocalyptic number.

21376824196 is a gapful number since it is divisible by the number (26) 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 21376824196, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23712478272).

21376824196 is an abundant number, since it is smaller than the sum of its proper divisors (26048132348).

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

21376824196 is a wasteful number, since it uses less digits than its factorization.

21376824196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110261 (or 110246 counting only the distinct ones).

The product of its digits is 870912, while the sum is 49.

The spelling of 21376824196 in words is "twenty-one billion, three hundred seventy-six million, eight hundred twenty-four thousand, one hundred ninety-six".