20406087475153 has 2 divisors, whose sum is σ = 20406087475154. Its totient is φ = 20406087475152.

The previous prime is 20406087475129. The next prime is 20406087475157. The reversal of 20406087475153 is 35157478060402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20019118878529 + 386968596624 = 4474273^2 + 622068^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20406087475153 is a prime.

It is a super-2 number, since 2×20406087475153² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20406087475153.

It is not a weakly prime, because it can be changed into another prime (20406087475157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10203043737576 + 10203043737577.

It is an arithmetic number, because the mean of its divisors is an integer number (10203043737577).

Almost surely, 2^{20406087475153} is an apocalyptic number.

It is an amenable number.

20406087475153 is a deficient number, since it is larger than the sum of its proper divisors (1).

20406087475153 is an equidigital number, since it uses as much as digits as its factorization.

20406087475153 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5644800, while the sum is 52.

The spelling of 20406087475153 in words is "twenty trillion, four hundred six billion, eighty-seven million, four hundred seventy-five thousand, one hundred fifty-three".