20425435153 has 4 divisors (see below), whose sum is σ = 20427000048. Its totient is φ = 20423870260.

The previous prime is 20425435123. The next prime is 20425435159. The reversal of 20425435153 is 35153452402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20425435153 - 2²⁵ = 20391880721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20425435159) 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, 762703 + ... + 789028.

It is an arithmetic number, because the mean of its divisors is an integer number (5106750012).

Almost surely, 2^20425435153 is an apocalyptic number.

It is an amenable number.

20425435153 is a deficient number, since it is larger than the sum of its proper divisors (1564895).

20425435153 is a wasteful number, since it uses less digits than its factorization.

20425435153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1564894.

The product of its (nonzero) digits is 72000, while the sum is 34.

Adding to 20425435153 its reverse (35153452402), we get a palindrome (55578887555).

The spelling of 20425435153 in words is "twenty billion, four hundred twenty-five million, four hundred thirty-five thousand, one hundred fifty-three".