20154311545 has 8 divisors (see below), whose sum is σ = 25236703296. Its totient is φ = 15422429616.

The previous prime is 20154311521. The next prime is 20154311549. The reversal of 20154311545 is 54511345102.

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 20154311545 - 2⁷ = 20154311417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20154311549) 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 in 7 ways as a sum of consecutive naturals, for example, 87627327 + ... + 87627556.

It is an arithmetic number, because the mean of its divisors is an integer number (3154587912).

Almost surely, 2^20154311545 is an apocalyptic number.

It is an amenable number.

20154311545 is a deficient number, since it is larger than the sum of its proper divisors (5082391751).

20154311545 is a wasteful number, since it uses less digits than its factorization.

20154311545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175254911.

The product of its (nonzero) digits is 12000, while the sum is 31.

Adding to 20154311545 its reverse (54511345102), we get a palindrome (74665656647).

The spelling of 20154311545 in words is "twenty billion, one hundred fifty-four million, three hundred eleven thousand, five hundred forty-five".