20531462497 has 16 divisors (see below), whose sum is σ = 25272860032. Its totient is φ = 16242508800.

The previous prime is 20531462473. The next prime is 20531462561. The reversal of 20531462497 is 79426413502.

It is not a de Polignac number, because 20531462497 - 2¹⁹ = 20530938209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20531462437) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1302658 + ... + 1318324.

It is an arithmetic number, because the mean of its divisors is an integer number (1579553752).

Almost surely, 2^20531462497 is an apocalyptic number.

It is an amenable number.

20531462497 is a deficient number, since it is larger than the sum of its proper divisors (4741397535).

20531462497 is a wasteful number, since it uses less digits than its factorization.

20531462497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30088.

The product of its (nonzero) digits is 362880, while the sum is 43.

Adding to 20531462497 its reverse (79426413502), we get a palindrome (99957875999).

The spelling of 20531462497 in words is "twenty billion, five hundred thirty-one million, four hundred sixty-two thousand, four hundred ninety-seven".