19135472149 has 4 divisors (see below), whose sum is σ = 19321253536. Its totient is φ = 18949690764.

The previous prime is 19135472137. The next prime is 19135472171. The reversal of 19135472149 is 94127453191.

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, and also an emirpimes, since its reverse is a distinct semiprime: 94127453191 = 73 ⋅1289417167.

It is a cyclic number.

It is not a de Polignac number, because 19135472149 - 2⁹ = 19135471637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19135472099 and 19135472108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19135472249) 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, 92890539 + ... + 92890744.

It is an arithmetic number, because the mean of its divisors is an integer number (4830313384).

Almost surely, 2^19135472149 is an apocalyptic number.

It is an amenable number.

19135472149 is a deficient number, since it is larger than the sum of its proper divisors (185781387).

19135472149 is a wasteful number, since it uses less digits than its factorization.

19135472149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185781386.

The product of its digits is 272160, while the sum is 46.

The spelling of 19135472149 in words is "nineteen billion, one hundred thirty-five million, four hundred seventy-two thousand, one hundred forty-nine".