20135325501 has 12 divisors (see below), whose sum is σ = 30087268380. Its totient is φ = 12960669120.

The previous prime is 20135325479. The next prime is 20135325533. The reversal of 20135325501 is 10552353102.

It is a happy number.

20135325501 is a `hidden beast` number, since 2 + 0 + 135 + 3 + 25 + 501 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 11476836900 + 8658488601 = 107130^2 + 93051^2 .

It is not a de Polignac number, because 20135325501 - 2²² = 20131131197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20135325571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38573160 + ... + 38573681.

It is an arithmetic number, because the mean of its divisors is an integer number (2507272365).

Almost surely, 2^20135325501 is an apocalyptic number.

It is an amenable number.

20135325501 is a deficient number, since it is larger than the sum of its proper divisors (9951942879).

20135325501 is a wasteful number, since it uses less digits than its factorization.

20135325501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77146876 (or 77146873 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

Adding to 20135325501 its reverse (10552353102), we get a palindrome (30687678603).

The spelling of 20135325501 in words is "twenty billion, one hundred thirty-five million, three hundred twenty-five thousand, five hundred one".