201845481820 has 12 divisors (see below), whose sum is σ = 423875511864. Its totient is φ = 80738192720.

The previous prime is 201845481779. The next prime is 201845481823. The reversal of 201845481820 is 28184548102.

It is a super-2 number, since 2×201845481820² (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 (201845481823) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5046137026 + ... + 5046137065.

It is an arithmetic number, because the mean of its divisors is an integer number (35322959322).

Almost surely, 2^201845481820 is an apocalyptic number.

201845481820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201845481820 is an abundant number, since it is smaller than the sum of its proper divisors (222030030044).

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

201845481820 is a wasteful number, since it uses less digits than its factorization.

201845481820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10092274100 (or 10092274098 counting only the distinct ones).

The product of its (nonzero) digits is 163840, while the sum is 43.

The spelling of 201845481820 in words is "two hundred one billion, eight hundred forty-five million, four hundred eighty-one thousand, eight hundred twenty".