20154044213 has 2 divisors, whose sum is σ = 20154044214. Its totient is φ = 20154044212.

The previous prime is 20154044203. The next prime is 20154044227. The reversal of 20154044213 is 31244045102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17993003044 + 2161041169 = 134138^2 + 46487^2 .

It is a cyclic number.

It is not a de Polignac number, because 20154044213 - 2¹⁸ = 20153782069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20154044203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10077022106 + 10077022107.

It is an arithmetic number, because the mean of its divisors is an integer number (10077022107).

Almost surely, 2^20154044213 is an apocalyptic number.

It is an amenable number.

20154044213 is a deficient number, since it is larger than the sum of its proper divisors (1).

20154044213 is an equidigital number, since it uses as much as digits as its factorization.

20154044213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 20154044213 its reverse (31244045102), we get a palindrome (51398089315).

The spelling of 20154044213 in words is "twenty billion, one hundred fifty-four million, forty-four thousand, two hundred thirteen".