19344451553 has 16 divisors (see below), whose sum is σ = 23135708160. Its totient is φ = 15814295376.

The previous prime is 19344451493. The next prime is 19344451559. The reversal of 19344451553 is 35515444391.

It is a cyclic number.

It is not a de Polignac number, because 19344451553 - 2²⁰ = 19343402977 is a prime.

It is a super-2 number, since 2×19344451553² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (19344451559) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117263 + ... + 228996.

It is an arithmetic number, because the mean of its divisors is an integer number (1445981760).

Almost surely, 2^19344451553 is an apocalyptic number.

It is an amenable number.

19344451553 is a deficient number, since it is larger than the sum of its proper divisors (3791256607).

19344451553 is a wasteful number, since it uses less digits than its factorization.

19344451553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346636.

The product of its digits is 648000, while the sum is 44.

The spelling of 19344451553 in words is "nineteen billion, three hundred forty-four million, four hundred fifty-one thousand, five hundred fifty-three".