20630616440 has 32 divisors (see below), whose sum is σ = 53050157280. Its totient is φ = 7073354112.

The previous prime is 20630616421. The next prime is 20630616463. The reversal of 20630616440 is 4461603602.

It is a super-3 number, since 3×20630616440³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20630616397 and 20630616406.

It is a congruent number.

It is an unprimeable number.

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, 36840107 + ... + 36840666.

It is an arithmetic number, because the mean of its divisors is an integer number (1657817415).

Almost surely, 2^20630616440 is an apocalyptic number.

20630616440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20630616440 is an abundant number, since it is smaller than the sum of its proper divisors (32419540840).

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

20630616440 is a wasteful number, since it uses less digits than its factorization.

20630616440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73680791 (or 73680787 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 32.

The spelling of 20630616440 in words is "twenty billion, six hundred thirty million, six hundred sixteen thousand, four hundred forty".