20510507080 has 32 divisors (see below), whose sum is σ = 52741304640. Its totient is φ = 7032173760.

The previous prime is 20510507041. The next prime is 20510507099. The reversal of 20510507080 is 8070501502.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36625626 + ... + 36626185.

It is an arithmetic number, because the mean of its divisors is an integer number (1648165770).

Almost surely, 2^20510507080 is an apocalyptic number.

20510507080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20510507080 is an abundant number, since it is smaller than the sum of its proper divisors (32230797560).

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

20510507080 is a wasteful number, since it uses less digits than its factorization.

20510507080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73251829 (or 73251825 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 28.

The spelling of 20510507080 in words is "twenty billion, five hundred ten million, five hundred seven thousand, eighty".