20502542203 has 16 divisors (see below), whose sum is σ = 24164404992. Its totient is φ = 17149572000.

The previous prime is 20502542183. The next prime is 20502542209. The reversal of 20502542203 is 30224520502.

It is a happy number.

It is not a de Polignac number, because 20502542203 - 2²⁵ = 20468987771 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20502542209) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 186033 + ... + 274978.

It is an arithmetic number, because the mean of its divisors is an integer number (1510275312).

Almost surely, 2^20502542203 is an apocalyptic number.

20502542203 is a deficient number, since it is larger than the sum of its proper divisors (3661862789).

20502542203 is a wasteful number, since it uses less digits than its factorization.

20502542203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461346.

The product of its (nonzero) digits is 4800, while the sum is 25.

The spelling of 20502542203 in words is "twenty billion, five hundred two million, five hundred forty-two thousand, two hundred three".