21454010213 has 4 divisors (see below), whose sum is σ = 21458296608. Its totient is φ = 21449723820.

The previous prime is 21454010197. The next prime is 21454010261. The reversal of 21454010213 is 31201045412.

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 21454010213 - 2⁴ = 21454010197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21454010273) 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, 2135681 + ... + 2145702.

It is an arithmetic number, because the mean of its divisors is an integer number (5364574152).

Almost surely, 2^21454010213 is an apocalyptic number.

It is an amenable number.

21454010213 is a deficient number, since it is larger than the sum of its proper divisors (4286395).

21454010213 is an equidigital number, since it uses as much as digits as its factorization.

21454010213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4286394.

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 21454010213 its reverse (31201045412), we get a palindrome (52655055625).

The spelling of 21454010213 in words is "twenty-one billion, four hundred fifty-four million, ten thousand, two hundred thirteen".