20111232020 has 48 divisors (see below), whose sum is σ = 47559246336. Its totient is φ = 7077264000.

The previous prime is 20111231977. The next prime is 20111232023. The reversal of 20111232020 is 2023211102.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20111231986 and 20111232004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111232023) 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, 1467611 + ... + 1481250.

It is an arithmetic number, because the mean of its divisors is an integer number (990817632).

Almost surely, 2^20111232020 is an apocalyptic number.

20111232020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20111232020 is an abundant number, since it is smaller than the sum of its proper divisors (27448014316).

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

20111232020 is a wasteful number, since it uses less digits than its factorization.

20111232020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2948912 (or 2948910 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 20111232020 its reverse (2023211102), we get a palindrome (22134443122).

The spelling of 20111232020 in words is "twenty billion, one hundred eleven million, two hundred thirty-two thousand, twenty".