11259019820 has 12 divisors (see below), whose sum is σ = 23643941664. Its totient is φ = 4503607920.

The previous prime is 11259019801. The next prime is 11259019841. The reversal of 11259019820 is 2891095211.

It is a happy number.

It is a super-3 number, since 3×11259019820³ (a number of 31 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 281475476 + ... + 281475515.

It is an arithmetic number, because the mean of its divisors is an integer number (1970328472).

Almost surely, 2^11259019820 is an apocalyptic number.

11259019820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11259019820 is an abundant number, since it is smaller than the sum of its proper divisors (12384921844).

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

11259019820 is a wasteful number, since it uses less digits than its factorization.

11259019820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 562951000 (or 562950998 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 38.

The spelling of 11259019820 in words is "eleven billion, two hundred fifty-nine million, nineteen thousand, eight hundred twenty".