20535235045 has 16 divisors (see below), whose sum is σ = 27038560752. Its totient is φ = 14878356480.

The previous prime is 20535235043. The next prime is 20535235069. The reversal of 20535235045 is 54053253502.

It can be written as a sum of positive squares in 8 ways, for example, as 1207840516 + 19327394529 = 34754^2 + 139023^2 .

It is not a de Polignac number, because 20535235045 - 2¹ = 20535235043 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20535235045.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20535235043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2976996 + ... + 2983885.

It is an arithmetic number, because the mean of its divisors is an integer number (1689910047).

Almost surely, 2^20535235045 is an apocalyptic number.

It is an amenable number.

20535235045 is a deficient number, since it is larger than the sum of its proper divisors (6503325707).

20535235045 is a wasteful number, since it uses less digits than its factorization.

20535235045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5960952.

The product of its (nonzero) digits is 90000, while the sum is 34.

Adding to 20535235045 its reverse (54053253502), we get a palindrome (74588488547).

The spelling of 20535235045 in words is "twenty billion, five hundred thirty-five million, two hundred thirty-five thousand, forty-five".