20215440203 has 16 divisors (see below), whose sum is σ = 24836766720. Its totient is φ = 16066273536.

The previous prime is 20215440187. The next prime is 20215440211. The reversal of 20215440203 is 30204451202.

It is a happy number.

It is not a de Polignac number, because 20215440203 - 2⁴ = 20215440187 is a prime.

It is a super-3 number, since 3×20215440203³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20215440283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1610726 + ... + 1623227.

It is an arithmetic number, because the mean of its divisors is an integer number (1552297920).

Almost surely, 2^20215440203 is an apocalyptic number.

20215440203 is a deficient number, since it is larger than the sum of its proper divisors (4621326517).

20215440203 is a wasteful number, since it uses less digits than its factorization.

20215440203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3234026.

The product of its (nonzero) digits is 1920, while the sum is 23.

Adding to 20215440203 its reverse (30204451202), we get a palindrome (50419891405).

The spelling of 20215440203 in words is "twenty billion, two hundred fifteen million, four hundred forty thousand, two hundred three".