20011220030 has 64 divisors (see below), whose sum is σ = 40372136640. Its totient is φ = 7104620544.

The previous prime is 20011220029. The next prime is 20011220051. The reversal of 20011220030 is 3002211002.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20011219993 and 20011220020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 164792 + ... + 259188.

It is an arithmetic number, because the mean of its divisors is an integer number (630814635).

Almost surely, 2^20011220030 is an apocalyptic number.

20011220030 is an abundant number, since it is smaller than the sum of its proper divisors (20360916610).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20011220030 is a wasteful number, since it uses less digits than its factorization.

20011220030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94493.

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 20011220030 its reverse (3002211002), we get a palindrome (23013431032).

The spelling of 20011220030 in words is "twenty billion, eleven million, two hundred twenty thousand, thirty".