20430156405441 has 4 divisors (see below), whose sum is σ = 27240208540592. Its totient is φ = 13620104270292.

The previous prime is 20430156405403. The next prime is 20430156405499. The reversal of 20430156405441 is 14450465103402.

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 not a de Polignac number, because 20430156405441 - 2⁹ = 20430156404929 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20430156405441.

It is not an unprimeable number, because it can be changed into a prime (20430156405401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3405026067571 + ... + 3405026067576.

It is an arithmetic number, because the mean of its divisors is an integer number (6810052135148).

Almost surely, 2^{20430156405441} is an apocalyptic number.

It is an amenable number.

20430156405441 is a deficient number, since it is larger than the sum of its proper divisors (6810052135151).

20430156405441 is an equidigital number, since it uses as much as digits as its factorization.

20430156405441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6810052135150.

The product of its (nonzero) digits is 230400, while the sum is 39.

The spelling of 20430156405441 in words is "twenty trillion, four hundred thirty billion, one hundred fifty-six million, four hundred five thousand, four hundred forty-one".