20115508080 has 40 divisors (see below), whose sum is σ = 62358075792. Its totient is φ = 5364135424.

The previous prime is 20115508079. The next prime is 20115508081. The reversal of 20115508080 is 8080551102.

It is an interprime number because it is at equal distance from previous prime (20115508079) and next prime (20115508081).

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20115508081) by changing a digit.

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, 41907069 + ... + 41907548.

Almost surely, 2^20115508080 is an apocalyptic number.

20115508080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20115508080 is an abundant number, since it is smaller than the sum of its proper divisors (42242567712).

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

20115508080 is a wasteful number, since it uses less digits than its factorization.

20115508080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83814633 (or 83814627 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 30.

The spelling of 20115508080 in words is "twenty billion, one hundred fifteen million, five hundred eight thousand, eighty".