20125002405 has 16 divisors (see below), whose sum is σ = 32222602944. Its totient is φ = 10725801600.

The previous prime is 20125002389. The next prime is 20125002467. The reversal of 20125002405 is 50420052102.

It is a happy number.

It is not a de Polignac number, because 20125002405 - 2⁴ = 20125002389 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 448696 + ... + 491505.

It is an arithmetic number, because the mean of its divisors is an integer number (2013912684).

Almost surely, 2^20125002405 is an apocalyptic number.

It is an amenable number.

20125002405 is a deficient number, since it is larger than the sum of its proper divisors (12097600539).

20125002405 is a wasteful number, since it uses less digits than its factorization.

20125002405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 941636.

The product of its (nonzero) digits is 800, while the sum is 21.

Adding to 20125002405 its reverse (50420052102), we get a palindrome (70545054507).

The spelling of 20125002405 in words is "twenty billion, one hundred twenty-five million, two thousand, four hundred five".