19948611579 has 8 divisors (see below), whose sum is σ = 28644160272. Its totient is φ = 12276068640.

The previous prime is 19948611509. The next prime is 19948611583. The reversal of 19948611579 is 97511684991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 19948611579 - 2¹⁷ = 19948480507 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19948611509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 255751392 + ... + 255751469.

It is an arithmetic number, because the mean of its divisors is an integer number (3580520034).

Almost surely, 2^19948611579 is an apocalyptic number.

19948611579 is a deficient number, since it is larger than the sum of its proper divisors (8695548693).

19948611579 is a wasteful number, since it uses less digits than its factorization.

19948611579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511502877.

The product of its digits is 4898880, while the sum is 60.

The spelling of 19948611579 in words is "nineteen billion, nine hundred forty-eight million, six hundred eleven thousand, five hundred seventy-nine".