20323312154 has 8 divisors (see below), whose sum is σ = 30799246548. Its totient is φ = 10056896640.

The previous prime is 20323312129. The next prime is 20323312169. The reversal of 20323312154 is 45121332302.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 17602124929 + 2721187225 = 132673^2 + 52165^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 52379477 + ... + 52379864.

Almost surely, 2^20323312154 is an apocalyptic number.

20323312154 is a deficient number, since it is larger than the sum of its proper divisors (10475934394).

20323312154 is a wasteful number, since it uses less digits than its factorization.

20323312154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104759440.

The product of its (nonzero) digits is 4320, while the sum is 26.

Adding to 20323312154 its reverse (45121332302), we get a palindrome (65444644456).

The spelling of 20323312154 in words is "twenty billion, three hundred twenty-three million, three hundred twelve thousand, one hundred fifty-four".