20021572275 has 48 divisors (see below), whose sum is σ = 34074828000. Its totient is φ = 10365788160.

The previous prime is 20021572229. The next prime is 20021572309. The reversal of 20021572275 is 57227512002.

It is not a de Polignac number, because 20021572275 - 2⁶ = 20021572211 is a prime.

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 47 ways as a sum of consecutive naturals, for example, 1237941 + ... + 1254009.

It is an arithmetic number, because the mean of its divisors is an integer number (709892250).

Almost surely, 2^20021572275 is an apocalyptic number.

20021572275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20021572275 is a deficient number, since it is larger than the sum of its proper divisors (14053255725).

20021572275 is a wasteful number, since it uses less digits than its factorization.

20021572275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16568 (or 16563 counting only the distinct ones).

The product of its (nonzero) digits is 19600, while the sum is 33.

The spelling of 20021572275 in words is "twenty billion, twenty-one million, five hundred seventy-two thousand, two hundred seventy-five".