19618157120 has 28 divisors (see below), whose sum is σ = 46715737404. Its totient is φ = 7847262720.

The previous prime is 19618157089. The next prime is 19618157129. The reversal of 19618157120 is 2175181691.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 4307559424 + 15310597696 = 65632^2 + 123736^2 .

It is not an unprimeable number, because it can be changed into a prime (19618157129) 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, 30653051 + ... + 30653690.

It is an arithmetic number, because the mean of its divisors is an integer number (1668419193).

Almost surely, 2^19618157120 is an apocalyptic number.

19618157120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19618157120 is an abundant number, since it is smaller than the sum of its proper divisors (27097580284).

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

19618157120 is an equidigital number, since it uses as much as digits as its factorization.

19618157120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61306758 (or 61306748 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 41.

The spelling of 19618157120 in words is "nineteen billion, six hundred eighteen million, one hundred fifty-seven thousand, one hundred twenty".