202838381820 has 48 divisors (see below), whose sum is σ = 631052745120. Its totient is φ = 54090235008.

The previous prime is 202838381813. The next prime is 202838381827. The reversal of 202838381820 is 28183838202.

It is an interprime number because it is at equal distance from previous prime (202838381813) and next prime (202838381827).

It is a super-2 number, since 2×202838381820² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202838381827) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 187812777 + ... + 187813856.

It is an arithmetic number, because the mean of its divisors is an integer number (13146932190).

Almost surely, 2^202838381820 is an apocalyptic number.

202838381820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202838381820 is an abundant number, since it is smaller than the sum of its proper divisors (428214363300).

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

202838381820 is a wasteful number, since it uses less digits than its factorization.

202838381820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375626651 (or 375626643 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 45.

The spelling of 202838381820 in words is "two hundred two billion, eight hundred thirty-eight million, three hundred eighty-one thousand, eight hundred twenty".