20431150511 has 16 divisors (see below), whose sum is σ = 21813077088. Its totient is φ = 19069440000.

The previous prime is 20431150489. The next prime is 20431150513. The reversal of 20431150511 is 11505113402.

It is a cyclic number.

It is not a de Polignac number, because 20431150511 - 2¹⁴ = 20431134127 is a prime.

It is a super-2 number, since 2×20431150511² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20431150513) 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, 5104511 + ... + 5108511.

It is an arithmetic number, because the mean of its divisors is an integer number (1363317318).

Almost surely, 2^20431150511 is an apocalyptic number.

20431150511 is a deficient number, since it is larger than the sum of its proper divisors (1381926577).

20431150511 is a wasteful number, since it uses less digits than its factorization.

20431150511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6442.

The product of its (nonzero) digits is 600, while the sum is 23.

Adding to 20431150511 its reverse (11505113402), we get a palindrome (31936263913).

The spelling of 20431150511 in words is "twenty billion, four hundred thirty-one million, one hundred fifty thousand, five hundred eleven".