19426401 has 12 divisors (see below), whose sum is σ = 28136212. Its totient is φ = 12915936.

The previous prime is 19426397. The next prime is 19426409. The reversal of 19426401 is 10462491.

19426401 is a `hidden beast` number, since 19 + 4 + 2 + 640 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 12006225 + 7420176 = 3465^2 + 2724^2 .

It is not a de Polignac number, because 19426401 - 2² = 19426397 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19426409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 855 + ... + 6291.

Almost surely, 2^19426401 is an apocalyptic number.

It is an amenable number.

19426401 is a deficient number, since it is larger than the sum of its proper divisors (8709811).

19426401 is a wasteful number, since it uses less digits than its factorization.

19426401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5840 (or 5837 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 19426401 is about 4407.5391092990. The cubic root of 19426401 is about 268.8215719959.

Adding to 19426401 its reverse (10462491), we get a palindrome (29888892).

The spelling of 19426401 in words is "nineteen million, four hundred twenty-six thousand, four hundred one".