21772535272 has 32 divisors (see below), whose sum is σ = 41018777280. Its totient is φ = 10834306560.

The previous prime is 21772535269. The next prime is 21772535299. The reversal of 21772535272 is 27253527712.

It is a super-2 number, since 2×21772535272² (a number of 21 digits) contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 1667923 + ... + 1680925.

It is an arithmetic number, because the mean of its divisors is an integer number (1281836790).

Almost surely, 2^21772535272 is an apocalyptic number.

It is an amenable number.

21772535272 is a deficient number, since it is larger than the sum of its proper divisors (19246242008).

21772535272 is a wasteful number, since it uses less digits than its factorization.

21772535272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13993 (or 13989 counting only the distinct ones).

The product of its digits is 411600, while the sum is 43.

The spelling of 21772535272 in words is "twenty-one billion, seven hundred seventy-two million, five hundred thirty-five thousand, two hundred seventy-two".