21324560025 has 24 divisors (see below), whose sum is σ = 35620088224. Its totient is φ = 11255846400.

The previous prime is 21324559969. The next prime is 21324560027. The reversal of 21324560025 is 52006542312.

It is not a de Polignac number, because 21324560025 - 2⁹ = 21324559513 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21324559974 and 21324560001.

It is not an unprimeable number, because it can be changed into a prime (21324560027) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1458331 + ... + 1472880.

Almost surely, 2^21324560025 is an apocalyptic number.

21324560025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21324560025 is a deficient number, since it is larger than the sum of its proper divisors (14295528199).

21324560025 is a wasteful number, since it uses less digits than its factorization.

21324560025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2931321 (or 2931316 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

The spelling of 21324560025 in words is "twenty-one billion, three hundred twenty-four million, five hundred sixty thousand, twenty-five".