20500501021630 has 48 divisors (see below), whose sum is σ = 42933178565280. Its totient is φ = 7027492264128.

The previous prime is 20500501021621. The next prime is 20500501021631. The reversal of 20500501021630 is 3612010500502.

It is a junction number, because it is equal to n+sod(n) for n = 20500501021595 and 20500501021604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20500501021631) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 964965 + ... + 6475504.

It is an arithmetic number, because the mean of its divisors is an integer number (894441220110).

Almost surely, 2^{20500501021630} is an apocalyptic number.

20500501021630 is an abundant number, since it is smaller than the sum of its proper divisors (22432677543650).

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

20500501021630 is a wasteful number, since it uses less digits than its factorization.

20500501021630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7446113 (or 7446106 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The spelling of 20500501021630 in words is "twenty trillion, five hundred billion, five hundred one million, twenty-one thousand, six hundred thirty".