11025979820 has 24 divisors (see below), whose sum is σ = 23157909600. Its totient is φ = 4409753472.

The previous prime is 11025979807. The next prime is 11025979831. The reversal of 11025979820 is 2897952011.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116696 + ... + 188864.

It is an arithmetic number, because the mean of its divisors is an integer number (964912900).

Almost surely, 2^11025979820 is an apocalyptic number.

11025979820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11025979820 is an abundant number, since it is smaller than the sum of its proper divisors (12131929780).

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

11025979820 is a wasteful number, since it uses less digits than its factorization.

11025979820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79817 (or 79815 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 44.

The spelling of 11025979820 in words is "eleven billion, twenty-five million, nine hundred seventy-nine thousand, eight hundred twenty".