202018383820 has 36 divisors (see below), whose sum is σ = 466311861792. Its totient is φ = 73461229600.

The previous prime is 202018383811. The next prime is 202018383821. The reversal of 202018383820 is 28383810202.

It is a super-2 number, since 2×202018383820² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 202018383820.

It is not an unprimeable number, because it can be changed into a prime (202018383821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41736916 + ... + 41741755.

It is an arithmetic number, because the mean of its divisors is an integer number (12953107272).

Almost surely, 2^202018383820 is an apocalyptic number.

202018383820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202018383820 is an abundant number, since it is smaller than the sum of its proper divisors (264293477972).

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

202018383820 is a wasteful number, since it uses less digits than its factorization.

202018383820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83478702 (or 83478689 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 37.

The spelling of 202018383820 in words is "two hundred two billion, eighteen million, three hundred eighty-three thousand, eight hundred twenty".