19401013 has 4 divisors (see below), whose sum is σ = 19412460. Its totient is φ = 19389568.

The previous prime is 19401007. The next prime is 19401017. The reversal of 19401013 is 31010491.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 2566404 + 16834609 = 1602^2 + 4103^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19401013 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 (19401017) 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, 2620 + ... + 6757.

It is an arithmetic number, because the mean of its divisors is an integer number (4853115).

Almost surely, 2^19401013 is an apocalyptic number.

It is an amenable number.

19401013 is a deficient number, since it is larger than the sum of its proper divisors (11447).

19401013 is an equidigital number, since it uses as much as digits as its factorization.

19401013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11446.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 19401013 is about 4404.6581025092. The cubic root of 19401013 is about 268.7044149833.

The spelling of 19401013 in words is "nineteen million, four hundred one thousand, thirteen".