19434196951 has 4 divisors (see below), whose sum is σ = 20929135192. Its totient is φ = 17939258712.

The previous prime is 19434196939. The next prime is 19434196997. The reversal of 19434196951 is 15969143491.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 19434196951 - 2⁷ = 19434196823 is a prime.

It is a super-2 number, since 2×19434196951² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19434196931) 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, 747469101 + ... + 747469126.

It is an arithmetic number, because the mean of its divisors is an integer number (5232283798).

Almost surely, 2^19434196951 is an apocalyptic number.

19434196951 is a deficient number, since it is larger than the sum of its proper divisors (1494938241).

19434196951 is a wasteful number, since it uses less digits than its factorization.

19434196951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1494938240.

The product of its digits is 1049760, while the sum is 52.

The spelling of 19434196951 in words is "nineteen billion, four hundred thirty-four million, one hundred ninety-six thousand, nine hundred fifty-one".