20505110030 has 32 divisors (see below), whose sum is σ = 37199748096. Its totient is φ = 8137662624.

The previous prime is 20505109979. The next prime is 20505110047. The reversal of 20505110030 is 3001150502.

It is a junction number, because it is equal to n+sod(n) for n = 20505109990 and 20505110008.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 902267 + ... + 924713.

It is an arithmetic number, because the mean of its divisors is an integer number (1162492128).

Almost surely, 2^20505110030 is an apocalyptic number.

20505110030 is a deficient number, since it is larger than the sum of its proper divisors (16694638066).

20505110030 is a wasteful number, since it uses less digits than its factorization.

20505110030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23168.

The product of its (nonzero) digits is 150, while the sum is 17.

Adding to 20505110030 its reverse (3001150502), we get a palindrome (23506260532).

The spelling of 20505110030 in words is "twenty billion, five hundred five million, one hundred ten thousand, thirty".