20016961518 has 16 divisors (see below), whose sum is σ = 40052630016. Its totient is φ = 6669202680.

The previous prime is 20016961501. The next prime is 20016961543. The reversal of 20016961518 is 81516961002.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 765528 + ... + 791243.

It is an arithmetic number, because the mean of its divisors is an integer number (2503289376).

Almost surely, 2^20016961518 is an apocalyptic number.

20016961518 is an abundant number, since it is smaller than the sum of its proper divisors (20035668498).

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

20016961518 is a wasteful number, since it uses less digits than its factorization.

20016961518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1558919.

The product of its (nonzero) digits is 25920, while the sum is 39.

The spelling of 20016961518 in words is "twenty billion, sixteen million, nine hundred sixty-one thousand, five hundred eighteen".