202206420640 has 96 divisors (see below), whose sum is σ = 546164809344. Its totient is φ = 69301570560.

The previous prime is 202206420617. The next prime is 202206420649. The reversal of 202206420640 is 46024602202.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 202206420599 and 202206420608.

It is not an unprimeable number, because it can be changed into a prime (202206420649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3036987 + ... + 3102853.

It is an arithmetic number, because the mean of its divisors is an integer number (5689216764).

Almost surely, 2^202206420640 is an apocalyptic number.

202206420640 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 202206420640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (273082404672).

202206420640 is an abundant number, since it is smaller than the sum of its proper divisors (343958388704).

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

202206420640 is a wasteful number, since it uses less digits than its factorization.

202206420640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68630 (or 68622 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

The spelling of 202206420640 in words is "two hundred two billion, two hundred six million, four hundred twenty thousand, six hundred forty".