20500435450 has 48 divisors (see below), whose sum is σ = 41683207104. Its totient is φ = 7439299200.

The previous prime is 20500435447. The next prime is 20500435477. The reversal of 20500435450 is 5453400502.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 229582 + ... + 306118.

It is an arithmetic number, because the mean of its divisors is an integer number (868400148).

Almost surely, 2^20500435450 is an apocalyptic number.

20500435450 is an abundant number, since it is smaller than the sum of its proper divisors (21182771654).

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

20500435450 is a wasteful number, since it uses less digits than its factorization.

20500435450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77047 (or 77042 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 28.

Adding to 20500435450 its reverse (5453400502), we get a palindrome (25953835952).

The spelling of 20500435450 in words is "twenty billion, five hundred million, four hundred thirty-five thousand, four hundred fifty".