20111232204 has 48 divisors (see below), whose sum is σ = 59588838400. Its totient is φ = 5746066128.

The previous prime is 20111232199. The next prime is 20111232217. The reversal of 20111232204 is 40223211102.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13300324 + ... + 13301835.

Almost surely, 2^20111232204 is an apocalyptic number.

It is an amenable number.

20111232204 is an abundant number, since it is smaller than the sum of its proper divisors (39477606196).

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

20111232204 is a wasteful number, since it uses less digits than its factorization.

20111232204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26602179 (or 26602171 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 20111232204 its reverse (40223211102), we get a palindrome (60334443306).

The spelling of 20111232204 in words is "twenty billion, one hundred eleven million, two hundred thirty-two thousand, two hundred four".