19672134461 has 4 divisors (see below), whose sum is σ = 22482439392. Its totient is φ = 16861829532.

The previous prime is 19672134421. The next prime is 19672134463. The reversal of 19672134461 is 16443127691.

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: 16443127691 = 35393 ⋅464587.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19672134461 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19672134463) 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, 1405152455 + ... + 1405152468.

It is an arithmetic number, because the mean of its divisors is an integer number (5620609848).

Almost surely, 2^19672134461 is an apocalyptic number.

It is an amenable number.

19672134461 is a deficient number, since it is larger than the sum of its proper divisors (2810304931).

19672134461 is an equidigital number, since it uses as much as digits as its factorization.

19672134461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2810304930.

The product of its digits is 217728, while the sum is 44.

The spelling of 19672134461 in words is "nineteen billion, six hundred seventy-two million, one hundred thirty-four thousand, four hundred sixty-one".