202124342640 has 160 divisors (see below), whose sum is σ = 684554685696. Its totient is φ = 48927662080.

The previous prime is 202124342633. The next prime is 202124342653. The reversal of 202124342640 is 46243421202.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 202124342598 and 202124342607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1747072 + ... + 1859168.

Almost surely, 2^202124342640 is an apocalyptic number.

202124342640 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 202124342640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (342277342848).

202124342640 is an abundant number, since it is smaller than the sum of its proper divisors (482430343056).

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

202124342640 is a wasteful number, since it uses less digits than its factorization.

202124342640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112807 (or 112801 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 30.

Adding to 202124342640 its reverse (46243421202), we get a palindrome (248367763842).

The spelling of 202124342640 in words is "two hundred two billion, one hundred twenty-four million, three hundred forty-two thousand, six hundred forty".