20887227272 has 36 divisors (see below), whose sum is σ = 40279800015. Its totient is φ = 10153995840.

The previous prime is 20887227233. The next prime is 20887227299. The reversal of 20887227272 is 27272278802.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 5 ways, for example, as 18072500356 + 2814726916 = 134434^2 + 53054^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=102194.

It is a super-2 number, since 2×20887227272² (a number of 21 digits) contains 22 as substring.

It is a Duffinian 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 8 ways as a sum of consecutive naturals, for example, 15124022 + ... + 15125402.

Almost surely, 2^20887227272 is an apocalyptic number.

It is an amenable number.

20887227272 is a deficient number, since it is larger than the sum of its proper divisors (19392572743).

20887227272 is an frugal number, since it uses more digits than its factorization.

20887227272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2842 (or 1420 counting only the distinct ones).

The product of its (nonzero) digits is 702464, while the sum is 47.

The spelling of 20887227272 in words is "twenty billion, eight hundred eighty-seven million, two hundred twenty-seven thousand, two hundred seventy-two".