20155501088 has 18 divisors (see below), whose sum is σ = 39682723941. Its totient is φ = 10077348992.

The previous prime is 20155501081. The next prime is 20155501123. The reversal of 20155501088 is 88010555102.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 19235470864 + 920030224 = 138692^2 + 30332^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=100388.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20155501081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 790556 + ... + 815652.

Almost surely, 2^20155501088 is an apocalyptic number.

It is an amenable number.

20155501088 is a deficient number, since it is larger than the sum of its proper divisors (19527222853).

20155501088 is an frugal number, since it uses more digits than its factorization.

20155501088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50204 (or 25099 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 35.

The spelling of 20155501088 in words is "twenty billion, one hundred fifty-five million, five hundred one thousand, eighty-eight".