20630756880 has 60 divisors (see below), whose sum is σ = 69284960940. Its totient is φ = 5501534976.

The previous prime is 20630756837. The next prime is 20630756899. The reversal of 20630756880 is 8865703602.

20630756880 is a `hidden beast` number, since 2 + 0 + 6 + 3 + 0 + 7 + 568 + 80 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 15945628176 + 4685128704 = 126276^2 + 68448^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14326195 + ... + 14327634.

It is an arithmetic number, because the mean of its divisors is an integer number (1154749349).

Almost surely, 2^20630756880 is an apocalyptic number.

20630756880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20630756880 is an abundant number, since it is smaller than the sum of its proper divisors (48654204060).

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

20630756880 is a wasteful number, since it uses less digits than its factorization.

20630756880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28653848 (or 28653839 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The spelling of 20630756880 in words is "twenty billion, six hundred thirty million, seven hundred fifty-six thousand, eight hundred eighty".