19916426 has 8 divisors (see below), whose sum is σ = 29899584. Its totient is φ = 9949900.

The previous prime is 19916419. The next prime is 19916441. The reversal of 19916426 is 62461991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×19916426² = 793328049226952, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19916426.

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, 530 + ... + 6333.

It is an arithmetic number, because the mean of its divisors is an integer number (3737448).

Almost surely, 2^19916426 is an apocalyptic number.

19916426 is a deficient number, since it is larger than the sum of its proper divisors (9983158).

19916426 is a wasteful number, since it uses less digits than its factorization.

19916426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8316.

The product of its digits is 23328, while the sum is 38.

The square root of 19916426 is about 4462.7823159997. The cubic root of 19916426 is about 271.0631425604.

The spelling of 19916426 in words is "nineteen million, nine hundred sixteen thousand, four hundred twenty-six".