19801518486 has 32 divisors (see below), whose sum is σ = 39824386560. Its totient is φ = 6563716896.

The previous prime is 19801518479. The next prime is 19801518557. The reversal of 19801518486 is 68481510891.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 784515 + ... + 809361.

It is an arithmetic number, because the mean of its divisors is an integer number (1244512080).

Almost surely, 2^19801518486 is an apocalyptic number.

19801518486 is an abundant number, since it is smaller than the sum of its proper divisors (20022868074).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19801518486 is a wasteful number, since it uses less digits than its factorization.

19801518486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25588.

The product of its (nonzero) digits is 552960, while the sum is 51.

The spelling of 19801518486 in words is "nineteen billion, eight hundred one million, five hundred eighteen thousand, four hundred eighty-six".