20512554151 has 4 divisors (see below), whose sum is σ = 20512926432. Its totient is φ = 20512181872.

The previous prime is 20512554143. The next prime is 20512554199. The reversal of 20512554151 is 15145521502.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15145521502 = 2 ⋅7572760751.

It is a cyclic number.

It is not a de Polignac number, because 20512554151 - 2³ = 20512554143 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 (20512554551) 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, 85270 + ... + 219763.

It is an arithmetic number, because the mean of its divisors is an integer number (5128231608).

Almost surely, 2^20512554151 is an apocalyptic number.

20512554151 is a deficient number, since it is larger than the sum of its proper divisors (372281).

20512554151 is an equidigital number, since it uses as much as digits as its factorization.

20512554151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372280.

The product of its (nonzero) digits is 10000, while the sum is 31.

The spelling of 20512554151 in words is "twenty billion, five hundred twelve million, five hundred fifty-four thousand, one hundred fifty-one".