20502422005 has 16 divisors (see below), whose sum is σ = 26529778800. Its totient is φ = 15120626688.

The previous prime is 20502421987. The next prime is 20502422009. The reversal of 20502422005 is 50022420502.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 2369645041 + 18132776964 = 48679^2 + 134658^2 .

It is a cyclic number.

It is not a de Polignac number, because 20502422005 - 2⁹ = 20502421493 is a prime.

It is a super-2 number, since 2×20502422005² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20502422009) 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, 153780 + ... + 254269.

It is an arithmetic number, because the mean of its divisors is an integer number (1658111175).

Almost surely, 2^20502422005 is an apocalyptic number.

It is an amenable number.

20502422005 is a deficient number, since it is larger than the sum of its proper divisors (6027356795).

20502422005 is a wasteful number, since it uses less digits than its factorization.

20502422005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408840.

The product of its (nonzero) digits is 1600, while the sum is 22.

Adding to 20502422005 its reverse (50022420502), we get a palindrome (70524842507).

The spelling of 20502422005 in words is "twenty billion, five hundred two million, four hundred twenty-two thousand, five".