19426413 has 4 divisors (see below), whose sum is σ = 25901888. Its totient is φ = 12950940.

The previous prime is 19426409. The next prime is 19426423. The reversal of 19426413 is 31462491.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 19426413 - 2² = 19426409 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19426423) 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, 3237733 + ... + 3237738.

It is an arithmetic number, because the mean of its divisors is an integer number (6475472).

Almost surely, 2^19426413 is an apocalyptic number.

It is an amenable number.

19426413 is a deficient number, since it is larger than the sum of its proper divisors (6475475).

19426413 is an equidigital number, since it uses as much as digits as its factorization.

19426413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6475474.

The product of its digits is 5184, while the sum is 30.

The square root of 19426413 is about 4407.5404706026. The cubic root of 19426413 is about 268.8216273477.

The spelling of 19426413 in words is "nineteen million, four hundred twenty-six thousand, four hundred thirteen".