20450513020 has 96 divisors (see below), whose sum is σ = 51284072448. Its totient is φ = 6697734912.

The previous prime is 20450512993. The next prime is 20450513021. The reversal of 20450513020 is 2031505402.

It is a junction number, because it is equal to n+sod(n) for n = 20450512982 and 20450513000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20450513021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2646202 + ... + 2653918.

It is an arithmetic number, because the mean of its divisors is an integer number (534209088).

Almost surely, 2^20450513020 is an apocalyptic number.

20450513020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20450513020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25642036224).

20450513020 is an abundant number, since it is smaller than the sum of its proper divisors (30833559428).

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

20450513020 is a wasteful number, since it uses less digits than its factorization.

20450513020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8579 (or 8577 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The spelling of 20450513020 in words is "twenty billion, four hundred fifty million, five hundred thirteen thousand, twenty".