20445135131 has 8 divisors (see below), whose sum is σ = 20607313680. Its totient is φ = 20283144448.

The previous prime is 20445135121. The next prime is 20445135143. The reversal of 20445135131 is 13153154402.

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

It is a cyclic number.

It is not a de Polignac number, because 20445135131 - 2¹⁴ = 20445118747 is a prime.

It is a super-2 number, since 2×20445135131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20445135094 and 20445135103.

It is not an unprimeable number, because it can be changed into a prime (20445135121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175715 + ... + 267891.

It is an arithmetic number, because the mean of its divisors is an integer number (2575914210).

Almost surely, 2^20445135131 is an apocalyptic number.

20445135131 is a deficient number, since it is larger than the sum of its proper divisors (162178549).

20445135131 is a wasteful number, since it uses less digits than its factorization.

20445135131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93933.

The product of its (nonzero) digits is 7200, while the sum is 29.

Adding to 20445135131 its reverse (13153154402), we get a palindrome (33598289533).

The spelling of 20445135131 in words is "twenty billion, four hundred forty-five million, one hundred thirty-five thousand, one hundred thirty-one".