20630756928 has 112 divisors (see below), whose sum is σ = 59312291840. Its totient is φ = 6304780800.

The previous prime is 20630756921. The next prime is 20630756941. The reversal of 20630756928 is 82965703602.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (20630756921) 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, 21873 + ... + 204303.

Almost surely, 2^20630756928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20630756928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29656145920).

20630756928 is an abundant number, since it is smaller than the sum of its proper divisors (38681534912).

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

20630756928 is a wasteful number, since it uses less digits than its factorization.

20630756928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182496 (or 182486 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 48.

The spelling of 20630756928 in words is "twenty billion, six hundred thirty million, seven hundred fifty-six thousand, nine hundred twenty-eight".