21350054103 has 16 divisors (see below), whose sum is σ = 32563883520. Its totient is φ = 12188605536.

The previous prime is 21350054023. The next prime is 21350054149. The reversal of 21350054103 is 30145005312.

It is not a de Polignac number, because 21350054103 - 2¹³ = 21350045911 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21350054303) 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, 453075 + ... + 497972.

It is an arithmetic number, because the mean of its divisors is an integer number (2035242720).

Almost surely, 2^21350054103 is an apocalyptic number.

21350054103 is a deficient number, since it is larger than the sum of its proper divisors (11213829417).

21350054103 is a wasteful number, since it uses less digits than its factorization.

21350054103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 952126.

The product of its (nonzero) digits is 1800, while the sum is 24.

Adding to 21350054103 its reverse (30145005312), we get a palindrome (51495059415).

The spelling of 21350054103 in words is "twenty-one billion, three hundred fifty million, fifty-four thousand, one hundred three".