20841507630 has 128 divisors (see below), whose sum is σ = 57434112000. Its totient is φ = 5373931392.

The previous prime is 20841507623. The next prime is 20841507647. The reversal of 20841507630 is 3670514802.

20841507630 is a `hidden beast` number, since 2 + 0 + 8 + 4 + 15 + 0 + 7 + 630 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1621971 + ... + 1634769.

It is an arithmetic number, because the mean of its divisors is an integer number (448704000).

Almost surely, 2^20841507630 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20841507630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28717056000).

20841507630 is an abundant number, since it is smaller than the sum of its proper divisors (36592604370).

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

20841507630 is a wasteful number, since it uses less digits than its factorization.

20841507630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13015 (or 13009 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The spelling of 20841507630 in words is "twenty billion, eight hundred forty-one million, five hundred seven thousand, six hundred thirty".