181202997020 has 24 divisors (see below), whose sum is σ = 380665744368. Its totient is φ = 72454636800.

The previous prime is 181202997011. The next prime is 181202997029. The reversal of 181202997020 is 20799202181.

It is an interprime number because it is at equal distance from previous prime (181202997011) and next prime (181202997029).

It is a super-2 number, since 2×181202997020² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181202997029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1604141 + ... + 1713380.

It is an arithmetic number, because the mean of its divisors is an integer number (15861072682).

Almost surely, 2^181202997020 is an apocalyptic number.

181202997020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

181202997020 is an abundant number, since it is smaller than the sum of its proper divisors (199462747348).

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

181202997020 is a wasteful number, since it uses less digits than its factorization.

181202997020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3320261 (or 3320259 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 41.

The spelling of 181202997020 in words is "one hundred eighty-one billion, two hundred two million, nine hundred ninety-seven thousand, twenty".