20553510123 has 6 divisors (see below), whose sum is σ = 29688403524. Its totient is φ = 13702340076.

The previous prime is 20553510113. The next prime is 20553510157. The reversal of 20553510123 is 32101535502.

It is a happy number.

20553510123 is a `hidden beast` number, since 2 + 0 + 5 + 535 + 1 + 0 + 123 = 666.

It is not a de Polignac number, because 20553510123 - 2⁶ = 20553510059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20553510113) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1141861665 + ... + 1141861682.

It is an arithmetic number, because the mean of its divisors is an integer number (4948067254).

Almost surely, 2^20553510123 is an apocalyptic number.

20553510123 is a deficient number, since it is larger than the sum of its proper divisors (9134893401).

20553510123 is a wasteful number, since it uses less digits than its factorization.

20553510123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2283723353 (or 2283723350 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The spelling of 20553510123 in words is "twenty billion, five hundred fifty-three million, five hundred ten thousand, one hundred twenty-three".