21896111424 has 56 divisors (see below), whose sum is σ = 63200145888. Its totient is φ = 6635184640.

The previous prime is 21896111407. The next prime is 21896111429. The reversal of 21896111424 is 42411169812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21896111429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5181627 + ... + 5185850.

Almost surely, 2^21896111424 is an apocalyptic number.

21896111424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21896111424 is an abundant number, since it is smaller than the sum of its proper divisors (41304034464).

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

21896111424 is a wasteful number, since it uses less digits than its factorization.

21896111424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10367503 (or 10367493 counting only the distinct ones).

The product of its digits is 27648, while the sum is 39.

The spelling of 21896111424 in words is "twenty-one billion, eight hundred ninety-six million, one hundred eleven thousand, four hundred twenty-four".