20436202047 has 8 divisors (see below), whose sum is σ = 27654960256. Its totient is φ = 13420789272.

The previous prime is 20436202037. The next prime is 20436202049. The reversal of 20436202047 is 74020263402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20436202047 - 2⁸ = 20436201791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20436202049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50836123 + ... + 50836524.

It is an arithmetic number, because the mean of its divisors is an integer number (3456870032).

Almost surely, 2^20436202047 is an apocalyptic number.

20436202047 is a deficient number, since it is larger than the sum of its proper divisors (7218758209).

20436202047 is a wasteful number, since it uses less digits than its factorization.

20436202047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101672717.

The product of its (nonzero) digits is 16128, while the sum is 30.

Adding to 20436202047 its reverse (74020263402), we get a palindrome (94456465449).

The spelling of 20436202047 in words is "twenty billion, four hundred thirty-six million, two hundred two thousand, forty-seven".