19238557454 has 4 divisors (see below), whose sum is σ = 28857836184. Its totient is φ = 9619278726.

The previous prime is 19238557453. The next prime is 19238557487. The reversal of 19238557454 is 45475583291.

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

It is a junction number, because it is equal to n+sod(n) for n = 19238557396 and 19238557405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19238557451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4809639362 + ... + 4809639365.

It is an arithmetic number, because the mean of its divisors is an integer number (7214459046).

Almost surely, 2^19238557454 is an apocalyptic number.

19238557454 is a deficient number, since it is larger than the sum of its proper divisors (9619278730).

19238557454 is an equidigital number, since it uses as much as digits as its factorization.

19238557454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9619278729.

The product of its digits is 6048000, while the sum is 53.

The spelling of 19238557454 in words is "nineteen billion, two hundred thirty-eight million, five hundred fifty-seven thousand, four hundred fifty-four".