202742117020 has 24 divisors (see below), whose sum is σ = 426045988368. Its totient is φ = 81042076800.

The previous prime is 202742116991. The next prime is 202742117089. The reversal of 202742117020 is 20711247202.

It is a super-2 number, since 2×202742117020² (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 202742117020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3392766 + ... + 3452005.

It is an arithmetic number, because the mean of its divisors is an integer number (17751916182).

Almost surely, 2^202742117020 is an apocalyptic number.

202742117020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202742117020 is an abundant number, since it is smaller than the sum of its proper divisors (223303871348).

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

202742117020 is a wasteful number, since it uses less digits than its factorization.

202742117020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6846261 (or 6846259 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 28.

The spelling of 202742117020 in words is "two hundred two billion, seven hundred forty-two million, one hundred seventeen thousand, twenty".