20154002443 has 4 divisors (see below), whose sum is σ = 20158852480. Its totient is φ = 20149152408.

The previous prime is 20154002431. The next prime is 20154002447. The reversal of 20154002443 is 34420045102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20154002443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20154002447) 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, 2418780 + ... + 2427097.

It is an arithmetic number, because the mean of its divisors is an integer number (5039713120).

Almost surely, 2^20154002443 is an apocalyptic number.

20154002443 is a deficient number, since it is larger than the sum of its proper divisors (4850037).

20154002443 is an equidigital number, since it uses as much as digits as its factorization.

20154002443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4850036.

The product of its (nonzero) digits is 3840, while the sum is 25.

Adding to 20154002443 its reverse (34420045102), we get a palindrome (54574047545).

The spelling of 20154002443 in words is "twenty billion, one hundred fifty-four million, two thousand, four hundred forty-three".