11020012020 has 72 divisors (see below), whose sum is σ = 33437653704. Its totient is φ = 2937765888.

The previous prime is 11020012019. The next prime is 11020012039. The reversal of 11020012020 is 2021002011.

It can be written as a sum of positive squares in 4 ways, for example, as 7127749476 + 3892262544 = 84426^2 + 62388^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 11020011993 and 11020012011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 744532 + ... + 759188.

It is an arithmetic number, because the mean of its divisors is an integer number (464411857).

Almost surely, 2^11020012020 is an apocalyptic number.

11020012020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11020012020 is an abundant number, since it is smaller than the sum of its proper divisors (22417641684).

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

11020012020 is a wasteful number, since it uses less digits than its factorization.

11020012020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18849 (or 18844 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 11020012020 its reverse (2021002011), we get a palindrome (13041014031).

The spelling of 11020012020 in words is "eleven billion, twenty million, twelve thousand, twenty".