20115450630 has 256 divisors, whose sum is σ = 61299763200. Its totient is φ = 4646315520.

The previous prime is 20115450629. The next prime is 20115450631. The reversal of 20115450630 is 3605451102.

20115450630 is a `hidden beast` number, since 2 + 0 + 1 + 154 + 506 + 3 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (20115450629) and next prime (20115450631).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 20115450594 and 20115450603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20115450631) by changing a digit.

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 127 ways as a sum of consecutive naturals, for example, 26572212 + ... + 26572968.

It is an arithmetic number, because the mean of its divisors is an integer number (239452200).

Almost surely, 2^20115450630 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20115450630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30649881600).

20115450630 is an abundant number, since it is smaller than the sum of its proper divisors (41184312570).

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

20115450630 is a wasteful number, since it uses less digits than its factorization.

20115450630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1196 (or 1190 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The spelling of 20115450630 in words is "twenty billion, one hundred fifteen million, four hundred fifty thousand, six hundred thirty".