20051605080 has 160 divisors (see below), whose sum is σ = 72580107600. Its totient is φ = 4935769344.

The previous prime is 20051605069. The next prime is 20051605081. The reversal of 20051605080 is 8050615002.

20051605080 is a `hidden beast` number, since 2 + 0 + 0 + 51 + 605 + 0 + 8 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20051605081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 195910 + ... + 280149.

Almost surely, 2^20051605080 is an apocalyptic number.

20051605080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20051605080 is an abundant number, since it is smaller than the sum of its proper divisors (52528502520).

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

20051605080 is a wasteful number, since it uses less digits than its factorization.

20051605080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476095 (or 476082 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The spelling of 20051605080 in words is "twenty billion, fifty-one million, six hundred five thousand, eighty".