19344004157 has 4 divisors (see below), whose sum is σ = 20185047840. Its totient is φ = 18502960476.

The previous prime is 19344004133. The next prime is 19344004181. The reversal of 19344004157 is 75140044391.

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 an interprime number because it is at equal distance from previous prime (19344004133) and next prime (19344004181).

It is a cyclic number.

It is not a de Polignac number, because 19344004157 - 2⁸ = 19344003901 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19344004157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19344004187) 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, 420521807 + ... + 420521852.

It is an arithmetic number, because the mean of its divisors is an integer number (5046261960).

Almost surely, 2^19344004157 is an apocalyptic number.

It is an amenable number.

19344004157 is a deficient number, since it is larger than the sum of its proper divisors (841043683).

19344004157 is an equidigital number, since it uses as much as digits as its factorization.

19344004157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 841043682.

The product of its (nonzero) digits is 60480, while the sum is 38.

The spelling of 19344004157 in words is "nineteen billion, three hundred forty-four million, four thousand, one hundred fifty-seven".