20154368161 has 8 divisors (see below), whose sum is σ = 21788506880. Its totient is φ = 18577567728.

The previous prime is 20154368153. The next prime is 20154368197. The reversal of 20154368161 is 16186345102.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20154368161 - 2³ = 20154368153 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a self number, because there is not a number n which added to its sum of digits gives 20154368161.

It is not an unprimeable number, because it can be changed into a prime (20154368461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14333841 + ... + 14335246.

It is an arithmetic number, because the mean of its divisors is an integer number (2723563360).

Almost surely, 2^20154368161 is an apocalyptic number.

It is an amenable number.

20154368161 is a deficient number, since it is larger than the sum of its proper divisors (1634138719).

20154368161 is a wasteful number, since it uses less digits than its factorization.

20154368161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28669143.

The product of its (nonzero) digits is 34560, while the sum is 37.

The spelling of 20154368161 in words is "twenty billion, one hundred fifty-four million, three hundred sixty-eight thousand, one hundred sixty-one".