20553012151 has 4 divisors (see below), whose sum is σ = 23489156752. Its totient is φ = 17616867552.

The previous prime is 20553012149. The next prime is 20553012173. The reversal of 20553012151 is 15121035502.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15121035502 = 2 ⋅7560517751.

It is a cyclic number.

It is not a de Polignac number, because 20553012151 - 2¹ = 20553012149 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 (20553012551) 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 3 ways as a sum of consecutive naturals, for example, 1468072290 + ... + 1468072303.

It is an arithmetic number, because the mean of its divisors is an integer number (5872289188).

Almost surely, 2^20553012151 is an apocalyptic number.

20553012151 is a deficient number, since it is larger than the sum of its proper divisors (2936144601).

20553012151 is an equidigital number, since it uses as much as digits as its factorization.

20553012151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2936144600.

The product of its (nonzero) digits is 1500, while the sum is 25.

Adding to 20553012151 its reverse (15121035502), we get a palindrome (35674047653).

The spelling of 20553012151 in words is "twenty billion, five hundred fifty-three million, twelve thousand, one hundred fifty-one".