16421926875 has 20 divisors (see below), whose sum is σ = 27361122888. Its totient is φ = 8758360000.

The previous prime is 16421926819. The next prime is 16421926907. The reversal of 16421926875 is 57862912461.

It is not a de Polignac number, because 16421926875 - 2⁹ = 16421926363 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4377306 + ... + 4381055.

Almost surely, 2^16421926875 is an apocalyptic number.

16421926875 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16421926875 is a deficient number, since it is larger than the sum of its proper divisors (10939196013).

16421926875 is an frugal number, since it uses more digits than its factorization.

16421926875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8758384 (or 8758369 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 51.

The spelling of 16421926875 in words is "sixteen billion, four hundred twenty-one million, nine hundred twenty-six thousand, eight hundred seventy-five".