20154368159 has 4 divisors (see below), whose sum is σ = 20155074216. Its totient is φ = 20153662104.

The previous prime is 20154368153. The next prime is 20154368197. The reversal of 20154368159 is 95186345102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95186345102 = 2 ⋅47593172551.

It is a cyclic number.

It is not a de Polignac number, because 20154368159 - 2³² = 15859400863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20154368153) 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, 308324 + ... + 367929.

It is an arithmetic number, because the mean of its divisors is an integer number (5038768554).

Almost surely, 2^20154368159 is an apocalyptic number.

20154368159 is a deficient number, since it is larger than the sum of its proper divisors (706057).

20154368159 is an equidigital number, since it uses as much as digits as its factorization.

20154368159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 706056.

The product of its (nonzero) digits is 259200, while the sum is 44.

The spelling of 20154368159 in words is "twenty billion, one hundred fifty-four million, three hundred sixty-eight thousand, one hundred fifty-nine".