19434154464 has 72 divisors (see below), whose sum is σ = 55288233000. Its totient is φ = 6475431168.

The previous prime is 19434154463. The next prime is 19434154507. The reversal of 19434154464 is 46445143491.

19434154464 is a `hidden beast` number, since 1 + 9 + 4 + 3 + 41 + 544 + 64 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×19434154464² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19434154463) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 779439 + ... + 803985.

It is an arithmetic number, because the mean of its divisors is an integer number (767892125).

Almost surely, 2^19434154464 is an apocalyptic number.

It is an amenable number.

19434154464 is an abundant number, since it is smaller than the sum of its proper divisors (35854078536).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19434154464 is a wasteful number, since it uses less digits than its factorization.

19434154464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27312 (or 27301 counting only the distinct ones).

The product of its digits is 829440, while the sum is 45.

The spelling of 19434154464 in words is "nineteen billion, four hundred thirty-four million, one hundred fifty-four thousand, four hundred sixty-four".