20502035430 has 32 divisors (see below), whose sum is σ = 49712158944. Its totient is φ = 5410845696.

The previous prime is 20502035429. The next prime is 20502035447. The reversal of 20502035430 is 3453020502.

It is a self number, because there is not a number n which added to its sum of digits gives 20502035430.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3519777 + ... + 3525596.

It is an arithmetic number, because the mean of its divisors is an integer number (1553504967).

Almost surely, 2^20502035430 is an apocalyptic number.

20502035430 is an abundant number, since it is smaller than the sum of its proper divisors (29210123514).

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

20502035430 is a wasteful number, since it uses less digits than its factorization.

20502035430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7045480.

The product of its (nonzero) digits is 3600, while the sum is 24.

Adding to 20502035430 its reverse (3453020502), we get a palindrome (23955055932).

The spelling of 20502035430 in words is "twenty billion, five hundred two million, thirty-five thousand, four hundred thirty".