20530431255 has 16 divisors (see below), whose sum is σ = 32875020000. Its totient is φ = 10940786688.

The previous prime is 20530431211. The next prime is 20530431263. The reversal of 20530431255 is 55213403502.

It is not a de Polignac number, because 20530431255 - 2¹⁷ = 20530300183 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 529182 + ... + 566651.

It is an arithmetic number, because the mean of its divisors is an integer number (2054688750).

Almost surely, 2^20530431255 is an apocalyptic number.

20530431255 is a deficient number, since it is larger than the sum of its proper divisors (12344588745).

20530431255 is a wasteful number, since it uses less digits than its factorization.

20530431255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1097090.

The product of its (nonzero) digits is 18000, while the sum is 30.

Adding to 20530431255 its reverse (55213403502), we get a palindrome (75743834757).

The spelling of 20530431255 in words is "twenty billion, five hundred thirty million, four hundred thirty-one thousand, two hundred fifty-five".