21454230113 has 4 divisors (see below), whose sum is σ = 21470496960. Its totient is φ = 21437963268.

The previous prime is 21454230103. The next prime is 21454230137. The reversal of 21454230113 is 31103245412.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21454230113 - 2³⁴ = 4274360929 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21454230103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8131445 + ... + 8134082.

It is an arithmetic number, because the mean of its divisors is an integer number (5367624240).

Almost surely, 2^21454230113 is an apocalyptic number.

It is an amenable number.

21454230113 is a deficient number, since it is larger than the sum of its proper divisors (16266847).

21454230113 is a wasteful number, since it uses less digits than its factorization.

21454230113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16266846.

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 21454230113 its reverse (31103245412), we get a palindrome (52557475525).

The spelling of 21454230113 in words is "twenty-one billion, four hundred fifty-four million, two hundred thirty thousand, one hundred thirteen".