20154323605 has 16 divisors (see below), whose sum is σ = 26072492544. Its totient is φ = 14867818560.

The previous prime is 20154323537. The next prime is 20154323611. The reversal of 20154323605 is 50632345102.

It is a happy number.

It is not a de Polignac number, because 20154323605 - 2¹¹ = 20154321557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96549 + ... + 222778.

It is an arithmetic number, because the mean of its divisors is an integer number (1629530784).

Almost surely, 2^20154323605 is an apocalyptic number.

It is an amenable number.

20154323605 is a deficient number, since it is larger than the sum of its proper divisors (5918168939).

20154323605 is a wasteful number, since it uses less digits than its factorization.

20154323605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320316.

The product of its (nonzero) digits is 21600, while the sum is 31.

Adding to 20154323605 its reverse (50632345102), we get a palindrome (70786668707).

The spelling of 20154323605 in words is "twenty billion, one hundred fifty-four million, three hundred twenty-three thousand, six hundred five".