20630384860 has 48 divisors (see below), whose sum is σ = 44512564320. Its totient is φ = 8028610560.

The previous prime is 20630384857. The next prime is 20630384861. The reversal of 20630384860 is 6848303602.

It is a super-2 number, since 2×20630384860² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20630384861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24340 + ... + 204580.

It is an arithmetic number, because the mean of its divisors is an integer number (927345090).

Almost surely, 2^20630384860 is an apocalyptic number.

20630384860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20630384860 is an abundant number, since it is smaller than the sum of its proper divisors (23882179460).

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

20630384860 is a wasteful number, since it uses less digits than its factorization.

20630384860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180406 (or 180404 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 40.

The spelling of 20630384860 in words is "twenty billion, six hundred thirty million, three hundred eighty-four thousand, eight hundred sixty".