19910409416 has 16 divisors (see below), whose sum is σ = 37579251840. Its totient is φ = 9889275600.

The previous prime is 19910409373. The next prime is 19910409427. The reversal of 19910409416 is 61490401991.

It is a super-2 number, since 2×19910409416² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

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, 8239856 + ... + 8242271.

It is an arithmetic number, because the mean of its divisors is an integer number (2348703240).

Almost surely, 2^19910409416 is an apocalyptic number.

It is an amenable number.

19910409416 is a deficient number, since it is larger than the sum of its proper divisors (17668842424).

19910409416 is a wasteful number, since it uses less digits than its factorization.

19910409416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16482284 (or 16482280 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 44.

The spelling of 19910409416 in words is "nineteen billion, nine hundred ten million, four hundred nine thousand, four hundred sixteen".