21324025104 has 20 divisors (see below), whose sum is σ = 55087064976. Its totient is φ = 7108008352.

The previous prime is 21324025103. The next prime is 21324025117. The reversal of 21324025104 is 40152042312.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (21324025103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 222125214 + ... + 222125309.

Almost surely, 2^21324025104 is an apocalyptic number.

21324025104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21324025104 is an abundant number, since it is smaller than the sum of its proper divisors (33763039872).

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

21324025104 is a wasteful number, since it uses less digits than its factorization.

21324025104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444250534 (or 444250528 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

Adding to 21324025104 its reverse (40152042312), we get a palindrome (61476067416).

The spelling of 21324025104 in words is "twenty-one billion, three hundred twenty-four million, twenty-five thousand, one hundred four".