19886989418 has 8 divisors (see below), whose sum is σ = 30524216448. Its totient is φ = 9712250604.

The previous prime is 19886989417. The next prime is 19886989439. The reversal of 19886989418 is 81498968891.

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

It is a super-2 number, since 2×19886989418² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19886989411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115621946 + ... + 115622117.

It is an arithmetic number, because the mean of its divisors is an integer number (3815527056).

Almost surely, 2^19886989418 is an apocalyptic number.

19886989418 is a deficient number, since it is larger than the sum of its proper divisors (10637227030).

19886989418 is a wasteful number, since it uses less digits than its factorization.

19886989418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231244108.

The product of its digits is 71663616, while the sum is 71.

The spelling of 19886989418 in words is "nineteen billion, eight hundred eighty-six million, nine hundred eighty-nine thousand, four hundred eighteen".