11192421820 has 48 divisors (see below), whose sum is σ = 24325711200. Its totient is φ = 4320610560.

The previous prime is 11192421817. The next prime is 11192421829. The reversal of 11192421820 is 2812429111.

It is a super-2 number, since 2×11192421820² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11192421829) 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, 2277526 + ... + 2282434.

It is an arithmetic number, because the mean of its divisors is an integer number (506785650).

Almost surely, 2^11192421820 is an apocalyptic number.

11192421820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11192421820 is an abundant number, since it is smaller than the sum of its proper divisors (13133289380).

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

11192421820 is a wasteful number, since it uses less digits than its factorization.

11192421820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8878 (or 8876 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 31.

The spelling of 11192421820 in words is "eleven billion, one hundred ninety-two million, four hundred twenty-one thousand, eight hundred twenty".