21727220325 has 48 divisors (see below), whose sum is σ = 37373607936. Its totient is φ = 11125598400.

The previous prime is 21727220321. The next prime is 21727220351. The reversal of 21727220325 is 52302272712.

It is not a de Polignac number, because 21727220325 - 2² = 21727220321 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21727220321) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 258484 + ... + 332066.

It is an arithmetic number, because the mean of its divisors is an integer number (778616832).

Almost surely, 2^21727220325 is an apocalyptic number.

21727220325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21727220325 is a deficient number, since it is larger than the sum of its proper divisors (15646387611).

21727220325 is a wasteful number, since it uses less digits than its factorization.

21727220325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73754 (or 73749 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 33.

The spelling of 21727220325 in words is "twenty-one billion, seven hundred twenty-seven million, two hundred twenty thousand, three hundred twenty-five".