20436502153 has 4 divisors (see below), whose sum is σ = 20436803200. Its totient is φ = 20436201108.

The previous prime is 20436502147. The next prime is 20436502157. The reversal of 20436502153 is 35120563402.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20436502153 - 2³³ = 11846567561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20436502157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4576 + ... + 202222.

It is an arithmetic number, because the mean of its divisors is an integer number (5109200800).

Almost surely, 2^20436502153 is an apocalyptic number.

It is an amenable number.

20436502153 is a deficient number, since it is larger than the sum of its proper divisors (301047).

20436502153 is a wasteful number, since it uses less digits than its factorization.

20436502153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301046.

The product of its (nonzero) digits is 21600, while the sum is 31.

The spelling of 20436502153 in words is "twenty billion, four hundred thirty-six million, five hundred two thousand, one hundred fifty-three".