20021271357 has 16 divisors (see below), whose sum is σ = 27868958208. Its totient is φ = 12761102640.

The previous prime is 20021271329. The next prime is 20021271373. The reversal of 20021271357 is 75317212002.

It is not a de Polignac number, because 20021271357 - 2⁶ = 20021271293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021271377) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 78958 + ... + 215120.

It is an arithmetic number, because the mean of its divisors is an integer number (1741809888).

Almost surely, 2^20021271357 is an apocalyptic number.

It is an amenable number.

20021271357 is a deficient number, since it is larger than the sum of its proper divisors (7847686851).

20021271357 is a wasteful number, since it uses less digits than its factorization.

20021271357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138320.

The product of its (nonzero) digits is 5880, while the sum is 30.

Adding to 20021271357 its reverse (75317212002), we get a palindrome (95338483359).

The spelling of 20021271357 in words is "twenty billion, twenty-one million, two hundred seventy-one thousand, three hundred fifty-seven".