11700021872 has 40 divisors (see below), whose sum is σ = 28262393472. Its totient is φ = 4558449600.

The previous prime is 11700021821. The next prime is 11700021887. The reversal of 11700021872 is 27812000711.

It is a congruent 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, 4747154 + ... + 4749617.

Almost surely, 2^11700021872 is an apocalyptic number.

It is an amenable number.

11700021872 is an abundant number, since it is smaller than the sum of its proper divisors (16562371600).

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

11700021872 is a wasteful number, since it uses less digits than its factorization.

11700021872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9496797 (or 9496791 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 29.

The spelling of 11700021872 in words is "eleven billion, seven hundred million, twenty-one thousand, eight hundred seventy-two".