20065647450 has 96 divisors (see below), whose sum is σ = 51425137152. Its totient is φ = 5172480000.

The previous prime is 20065647449. The next prime is 20065647467. The reversal of 20065647450 is 5474656002.

It is a junction number, because it is equal to n+sod(n) for n = 20065647399 and 20065647408.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5582854 + ... + 5586446.

It is an arithmetic number, because the mean of its divisors is an integer number (535678512).

Almost surely, 2^20065647450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20065647450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25712568576).

20065647450 is an abundant number, since it is smaller than the sum of its proper divisors (31359489702).

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

20065647450 is a wasteful number, since it uses less digits than its factorization.

20065647450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4840 (or 4835 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 39.

The spelling of 20065647450 in words is "twenty billion, sixty-five million, six hundred forty-seven thousand, four hundred fifty".