20236416465 has 32 divisors (see below), whose sum is σ = 32566060800. Its totient is φ = 10730244096.

The previous prime is 20236416461. The next prime is 20236416503. The reversal of 20236416465 is 56461463202.

It is not a de Polignac number, because 20236416465 - 2² = 20236416461 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20236416461) 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 31 ways as a sum of consecutive naturals, for example, 7141689 + ... + 7144521.

It is an arithmetic number, because the mean of its divisors is an integer number (1017689400).

Almost surely, 2^20236416465 is an apocalyptic number.

It is an amenable number.

20236416465 is a deficient number, since it is larger than the sum of its proper divisors (12329644335).

20236416465 is a wasteful number, since it uses less digits than its factorization.

20236416465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5433.

The product of its (nonzero) digits is 207360, while the sum is 39.

Adding to 20236416465 its reverse (56461463202), we get a palindrome (76697879667).

The spelling of 20236416465 in words is "twenty billion, two hundred thirty-six million, four hundred sixteen thousand, four hundred sixty-five".