20425102135 has 8 divisors (see below), whose sum is σ = 24739189776. Its totient is φ = 16187370240.

The previous prime is 20425102133. The next prime is 20425102177. The reversal of 20425102135 is 53120152402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20425102135 - 2¹ = 20425102133 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 (20425102133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19088346 + ... + 19089415.

It is an arithmetic number, because the mean of its divisors is an integer number (3092398722).

Almost surely, 2^20425102135 is an apocalyptic number.

20425102135 is a deficient number, since it is larger than the sum of its proper divisors (4314087641).

20425102135 is a wasteful number, since it uses less digits than its factorization.

20425102135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38177873.

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 20425102135 its reverse (53120152402), we get a palindrome (73545254537).

The spelling of 20425102135 in words is "twenty billion, four hundred twenty-five million, one hundred two thousand, one hundred thirty-five".