20525405005 has 32 divisors (see below), whose sum is σ = 30083602176. Its totient is φ = 13122806784.

The previous prime is 20525405003. The next prime is 20525405041. The reversal of 20525405005 is 50050452502.

It is a cyclic number.

It is not a de Polignac number, because 20525405005 - 2¹ = 20525405003 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 (20525405003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 97534 + ... + 224863.

It is an arithmetic number, because the mean of its divisors is an integer number (940112568).

Almost surely, 2^20525405005 is an apocalyptic number.

It is an amenable number.

20525405005 is a deficient number, since it is larger than the sum of its proper divisors (9558197171).

20525405005 is a wasteful number, since it uses less digits than its factorization.

20525405005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322533.

The product of its (nonzero) digits is 10000, while the sum is 28.

Adding to 20525405005 its reverse (50050452502), we get a palindrome (70575857507).

The spelling of 20525405005 in words is "twenty billion, five hundred twenty-five million, four hundred five thousand, five".