21452441151 has 16 divisors (see below), whose sum is σ = 30503692800. Its totient is φ = 13363513728.

The previous prime is 21452441147. The next prime is 21452441209. The reversal of 21452441151 is 15114425412.

It is not a de Polignac number, because 21452441151 - 2² = 21452441147 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21452441141) 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, 1505991 + ... + 1520168.

It is an arithmetic number, because the mean of its divisors is an integer number (1906480800).

Almost surely, 2^21452441151 is an apocalyptic number.

21452441151 is a deficient number, since it is larger than the sum of its proper divisors (9051251649).

21452441151 is a wasteful number, since it uses less digits than its factorization.

21452441151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3026318.

The product of its digits is 6400, while the sum is 30.

Adding to 21452441151 its reverse (15114425412), we get a palindrome (36566866563).

The spelling of 21452441151 in words is "twenty-one billion, four hundred fifty-two million, four hundred forty-one thousand, one hundred fifty-one".