21980229272 has 16 divisors (see below), whose sum is σ = 41251716240. Its totient is φ = 10979771616.

The previous prime is 21980229253. The next prime is 21980229343. The reversal of 21980229272 is 27292208912.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1283843 + ... + 1300850.

It is an arithmetic number, because the mean of its divisors is an integer number (2578232265).

Almost surely, 2^21980229272 is an apocalyptic number.

It is an amenable number.

21980229272 is a deficient number, since it is larger than the sum of its proper divisors (19271486968).

21980229272 is a wasteful number, since it uses less digits than its factorization.

21980229272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2585762 (or 2585758 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 44.

The spelling of 21980229272 in words is "twenty-one billion, nine hundred eighty million, two hundred twenty-nine thousand, two hundred seventy-two".