21825288016 has 20 divisors (see below), whose sum is σ = 48327423712. Its totient is φ = 9353694816.

The previous prime is 21825287987. The next prime is 21825288029. The reversal of 21825288016 is 61088252812.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97434210 + ... + 97434433.

Almost surely, 2^21825288016 is an apocalyptic number.

It is an amenable number.

21825288016 is an abundant number, since it is smaller than the sum of its proper divisors (26502135696).

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

21825288016 is a wasteful number, since it uses less digits than its factorization.

21825288016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194868658 (or 194868652 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 43.

The spelling of 21825288016 in words is "twenty-one billion, eight hundred twenty-five million, two hundred eighty-eight thousand, sixteen".