21982823625 has 32 divisors (see below), whose sum is σ = 41805054720. Its totient is φ = 10049289600.

The previous prime is 21982823617. The next prime is 21982823647. The reversal of 21982823625 is 52632828912.

It is not a de Polignac number, because 21982823625 - 2³ = 21982823617 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4184580 + ... + 4189829.

It is an arithmetic number, because the mean of its divisors is an integer number (1306407960).

Almost surely, 2^21982823625 is an apocalyptic number.

21982823625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21982823625 is a deficient number, since it is larger than the sum of its proper divisors (19822231095).

21982823625 is an equidigital number, since it uses as much as digits as its factorization.

21982823625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8374434 (or 8374424 counting only the distinct ones).

The product of its digits is 829440, while the sum is 48.

The spelling of 21982823625 in words is "twenty-one billion, nine hundred eighty-two million, eight hundred twenty-three thousand, six hundred twenty-five".