16866036420 has 96 divisors (see below), whose sum is σ = 47642781312. Its totient is φ = 4457975808.

The previous prime is 16866036391. The next prime is 16866036449. The reversal of 16866036420 is 2463066861.

It is an interprime number because it is at equal distance from previous prime (16866036391) and next prime (16866036449).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3661839 + ... + 3666441.

It is an arithmetic number, because the mean of its divisors is an integer number (496278972).

Almost surely, 2^16866036420 is an apocalyptic number.

16866036420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16866036420 is an abundant number, since it is smaller than the sum of its proper divisors (30776744892).

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

16866036420 is a wasteful number, since it uses less digits than its factorization.

16866036420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5141 (or 5139 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 42.

The spelling of 16866036420 in words is "sixteen billion, eight hundred sixty-six million, thirty-six thousand, four hundred twenty".