19826077454 has 4 divisors (see below), whose sum is σ = 29739116184. Its totient is φ = 9913038726.

The previous prime is 19826077429. The next prime is 19826077457. The reversal of 19826077454 is 45477062891.

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 = 19826077396 and 19826077405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19826077457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4956519362 + ... + 4956519365.

It is an arithmetic number, because the mean of its divisors is an integer number (7434779046).

Almost surely, 2^19826077454 is an apocalyptic number.

19826077454 is a deficient number, since it is larger than the sum of its proper divisors (9913038730).

19826077454 is an equidigital number, since it uses as much as digits as its factorization.

19826077454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9913038729.

The product of its (nonzero) digits is 3386880, while the sum is 53.

The spelling of 19826077454 in words is "nineteen billion, eight hundred twenty-six million, seventy-seven thousand, four hundred fifty-four".