20502115434 has 24 divisors (see below), whose sum is σ = 45366384960. Its totient is φ = 6688633128.

The previous prime is 20502115427. The next prime is 20502115483. The reversal of 20502115434 is 43451120502.

20502115434 is a `hidden beast` number, since 2 + 0 + 502 + 1 + 154 + 3 + 4 = 666.

It is a super-2 number, since 2×20502115434² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20502115398 and 20502115407.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12116244 + ... + 12117935.

It is an arithmetic number, because the mean of its divisors is an integer number (1890266040).

Almost surely, 2^20502115434 is an apocalyptic number.

20502115434 is an abundant number, since it is smaller than the sum of its proper divisors (24864269526).

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

20502115434 is a wasteful number, since it uses less digits than its factorization.

20502115434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24234234 (or 24234231 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

Adding to 20502115434 its reverse (43451120502), we get a palindrome (63953235936).

The spelling of 20502115434 in words is "twenty billion, five hundred two million, one hundred fifteen thousand, four hundred thirty-four".