20680135480 has 32 divisors (see below), whose sum is σ = 48134800800. Its totient is φ = 7986810496.

The previous prime is 20680135459. The next prime is 20680135507. The reversal of 20680135480 is 8453108602.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8912692 + ... + 8915011.

It is an arithmetic number, because the mean of its divisors is an integer number (1504212525).

Almost surely, 2^20680135480 is an apocalyptic number.

20680135480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20680135480 is an abundant number, since it is smaller than the sum of its proper divisors (27454665320).

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

20680135480 is a wasteful number, since it uses less digits than its factorization.

20680135480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17827743 (or 17827739 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 37.

The spelling of 20680135480 in words is "twenty billion, six hundred eighty million, one hundred thirty-five thousand, four hundred eighty".