20425150553 has 4 divisors (see below), whose sum is σ = 20425436388. Its totient is φ = 20424864720.

The previous prime is 20425150541. The next prime is 20425150583. The reversal of 20425150553 is 35505152402.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 35505152402 = 2 ⋅17752576201.

It can be written as a sum of positive squares in 2 ways, for example, as 5430658249 + 14994492304 = 73693^2 + 122452^2 .

It is a cyclic number.

It is not a de Polignac number, because 20425150553 - 2¹⁶ = 20425085017 is a prime.

It is a super-2 number, since 2×20425150553² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20425150583) 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, 70943 + ... + 214203.

It is an arithmetic number, because the mean of its divisors is an integer number (5106359097).

Almost surely, 2^20425150553 is an apocalyptic number.

It is an amenable number.

20425150553 is a deficient number, since it is larger than the sum of its proper divisors (285835).

20425150553 is a wasteful number, since it uses less digits than its factorization.

20425150553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285834.

The product of its (nonzero) digits is 30000, while the sum is 32.

The spelling of 20425150553 in words is "twenty billion, four hundred twenty-five million, one hundred fifty thousand, five hundred fifty-three".