20154324243 has 16 divisors (see below), whose sum is σ = 27062660736. Its totient is φ = 13341257280.

The previous prime is 20154324227. The next prime is 20154324263. The reversal of 20154324243 is 34242345102.

It is not a de Polignac number, because 20154324243 - 2⁴ = 20154324227 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20154324243.

It is not an unprimeable number, because it can be changed into a prime (20154324263) 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, 517648 + ... + 555218.

It is an arithmetic number, because the mean of its divisors is an integer number (1691416296).

Almost surely, 2^20154324243 is an apocalyptic number.

20154324243 is a deficient number, since it is larger than the sum of its proper divisors (6908336493).

20154324243 is a wasteful number, since it uses less digits than its factorization.

20154324243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38834.

The product of its (nonzero) digits is 23040, while the sum is 30.

Adding to 20154324243 its reverse (34242345102), we get a palindrome (54396669345).

The spelling of 20154324243 in words is "twenty billion, one hundred fifty-four million, three hundred twenty-four thousand, two hundred forty-three".