20542465203 has 16 divisors (see below), whose sum is σ = 30779347200. Its totient is φ = 12091885344.

The previous prime is 20542465189. The next prime is 20542465211. The reversal of 20542465203 is 30256424502.

It is a happy number.

It is not a de Polignac number, because 20542465203 - 2⁴ = 20542465187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20542465213) 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, 11449753 + ... + 11451546.

It is an arithmetic number, because the mean of its divisors is an integer number (1923709200).

Almost surely, 2^20542465203 is an apocalyptic number.

20542465203 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20542465203 is a deficient number, since it is larger than the sum of its proper divisors (10236881997).

20542465203 is a wasteful number, since it uses less digits than its factorization.

20542465203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22901338.

The product of its (nonzero) digits is 57600, while the sum is 33.

Adding to 20542465203 its reverse (30256424502), we get a palindrome (50798889705).

The spelling of 20542465203 in words is "twenty billion, five hundred forty-two million, four hundred sixty-five thousand, two hundred three".