20502341436 has 24 divisors (see below), whose sum is σ = 47975880400. Its totient is φ = 6814530432.

The previous prime is 20502341423. The next prime is 20502341437. The reversal of 20502341436 is 63414320502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20502341437) 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, 2443561 + ... + 2451936.

Almost surely, 2^20502341436 is an apocalyptic number.

It is an amenable number.

20502341436 is an abundant number, since it is smaller than the sum of its proper divisors (27473538964).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20502341436 is a wasteful number, since it uses less digits than its factorization.

20502341436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4895853 (or 4895851 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

Adding to 20502341436 its reverse (63414320502), we get a palindrome (83916661938).

The spelling of 20502341436 in words is "twenty billion, five hundred two million, three hundred forty-one thousand, four hundred thirty-six".