18619029216 has 72 divisors (see below), whose sum is σ = 52989935544. Its totient is φ = 6201411840.

The previous prime is 18619029203. The next prime is 18619029223. The reversal of 18619029216 is 61292091681.

18619029216 is a `hidden beast` number, since 1 + 8 + 619 + 0 + 2 + 9 + 21 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 346770 + ... + 396846.

It is an arithmetic number, because the mean of its divisors is an integer number (735971327).

Almost surely, 2^18619029216 is an apocalyptic number.

18619029216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18619029216 is an abundant number, since it is smaller than the sum of its proper divisors (34370906328).

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

18619029216 is a wasteful number, since it uses less digits than its factorization.

18619029216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51384 (or 51373 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The spelling of 18619029216 in words is "eighteen billion, six hundred nineteen million, twenty-nine thousand, two hundred sixteen".