21925345550 has 48 divisors (see below), whose sum is σ = 41137759872. Its totient is φ = 8693599200.

The previous prime is 21925345537. The next prime is 21925345567. The reversal of 21925345550 is 5554352912.

It is a junction number, because it is equal to n+sod(n) for n = 21925345498 and 21925345507.

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 23 ways as a sum of consecutive naturals, for example, 10524809 + ... + 10526891.

It is an arithmetic number, because the mean of its divisors is an integer number (857036664).

Almost surely, 2^21925345550 is an apocalyptic number.

21925345550 is a deficient number, since it is larger than the sum of its proper divisors (19212414322).

21925345550 is a wasteful number, since it uses less digits than its factorization.

21925345550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3833 (or 3828 counting only the distinct ones).

The product of its (nonzero) digits is 270000, while the sum is 41.

The spelling of 21925345550 in words is "twenty-one billion, nine hundred twenty-five million, three hundred forty-five thousand, five hundred fifty".