21824322825 has 12 divisors (see below), whose sum is σ = 36082880528. Its totient is φ = 11639638800.

The previous prime is 21824322799. The next prime is 21824322851. The reversal of 21824322825 is 52822342812.

It is an interprime number because it is at equal distance from previous prime (21824322799) and next prime (21824322851).

It is not a de Polignac number, because 21824322825 - 2¹⁹ = 21823798537 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 145495411 + ... + 145495560.

Almost surely, 2^21824322825 is an apocalyptic number.

21824322825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21824322825 is a deficient number, since it is larger than the sum of its proper divisors (14258557703).

21824322825 is a wasteful number, since it uses less digits than its factorization.

21824322825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290990984 (or 290990979 counting only the distinct ones).

The product of its digits is 122880, while the sum is 39.

The spelling of 21824322825 in words is "twenty-one billion, eight hundred twenty-four million, three hundred twenty-two thousand, eight hundred twenty-five".