20824136965 has 16 divisors (see below), whose sum is σ = 25754097600. Its totient is φ = 16154796672.

The previous prime is 20824136947. The next prime is 20824136989. The reversal of 20824136965 is 56963142802.

It is a cyclic number.

It is not a de Polignac number, because 20824136965 - 2⁹ = 20824136453 is a prime.

It is a super-2 number, since 2×20824136965² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 318520 + ... + 378289.

It is an arithmetic number, because the mean of its divisors is an integer number (1609631100).

Almost surely, 2^20824136965 is an apocalyptic number.

It is an amenable number.

20824136965 is a deficient number, since it is larger than the sum of its proper divisors (4929960635).

20824136965 is a wasteful number, since it uses less digits than its factorization.

20824136965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696996.

The product of its (nonzero) digits is 622080, while the sum is 46.

The spelling of 20824136965 in words is "twenty billion, eight hundred twenty-four million, one hundred thirty-six thousand, nine hundred sixty-five".