13025543021 has 4 divisors (see below), whose sum is σ = 13791751452. Its totient is φ = 12259334592.

The previous prime is 13025542973. The next prime is 13025543023. The reversal of 13025543021 is 12034552031.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12034552031 = 37 ⋅325258163.

It can be written as a sum of positive squares in 2 ways, for example, as 5150932900 + 7874610121 = 71770^2 + 88739^2 .

It is a cyclic number.

It is not a de Polignac number, because 13025543021 - 2²⁶ = 12958434157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13025543023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 383104190 + ... + 383104223.

It is an arithmetic number, because the mean of its divisors is an integer number (3447937863).

Almost surely, 2^13025543021 is an apocalyptic number.

It is an amenable number.

13025543021 is a deficient number, since it is larger than the sum of its proper divisors (766208431).

13025543021 is an equidigital number, since it uses as much as digits as its factorization.

13025543021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 766208430.

The product of its (nonzero) digits is 3600, while the sum is 26.

The spelling of 13025543021 in words is "thirteen billion, twenty-five million, five hundred forty-three thousand, twenty-one".