20191426 has 8 divisors (see below), whose sum is σ = 30348864. Its totient is φ = 10075140.

The previous prime is 20191421. The next prime is 20191429. The reversal of 20191426 is 62419102.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20191426.

It is not an unprimeable number, because it can be changed into a prime (20191421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9030 + ... + 11041.

It is an arithmetic number, because the mean of its divisors is an integer number (3793608).

Almost surely, 2^20191426 is an apocalyptic number.

20191426 is a deficient number, since it is larger than the sum of its proper divisors (10157438).

20191426 is a wasteful number, since it uses less digits than its factorization.

20191426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20576.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 20191426 is about 4493.4870646303. The cubic root of 20191426 is about 272.3050301336.

The spelling of 20191426 in words is "twenty million, one hundred ninety-one thousand, four hundred twenty-six".