16003917940 has 12 divisors (see below), whose sum is σ = 33608227716. Its totient is φ = 6401567168.

The previous prime is 16003917913. The next prime is 16003917959. The reversal of 16003917940 is 4971930061.

It can be written as a sum of positive squares in 2 ways, for example, as 5063176336 + 10940741604 = 71156^2 + 104598^2 .

It is a super-2 number, since 2×16003917940² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16003917893 and 16003917902.

It is a congruent number.

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, 400097929 + ... + 400097968.

It is an arithmetic number, because the mean of its divisors is an integer number (2800685643).

Almost surely, 2^16003917940 is an apocalyptic number.

16003917940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16003917940 is an abundant number, since it is smaller than the sum of its proper divisors (17604309776).

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

16003917940 is a wasteful number, since it uses less digits than its factorization.

16003917940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800195906 (or 800195904 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 40.

The spelling of 16003917940 in words is "sixteen billion, three million, nine hundred seventeen thousand, nine hundred forty".