20524788669 has 16 divisors (see below), whose sum is σ = 34119129600. Its totient is φ = 10662227760.

The previous prime is 20524788649. The next prime is 20524788671. The reversal of 20524788669 is 96688742502.

It is a happy number.

It is not a de Polignac number, because 20524788669 - 2²⁹ = 19987917757 is a prime.

It is a super-2 number, since 2×20524788669² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20524788649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44425719 + ... + 44426180.

It is an arithmetic number, because the mean of its divisors is an integer number (2132445600).

Almost surely, 2^20524788669 is an apocalyptic number.

It is an amenable number.

20524788669 is a deficient number, since it is larger than the sum of its proper divisors (13594340931).

20524788669 is a wasteful number, since it uses less digits than its factorization.

20524788669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88851920.

The product of its (nonzero) digits is 11612160, while the sum is 57.

The spelling of 20524788669 in words is "twenty billion, five hundred twenty-four million, seven hundred eighty-eight thousand, six hundred sixty-nine".