1001811910020 has 24 divisors (see below), whose sum is σ = 2805073348224. Its totient is φ = 267149842656.

The previous prime is 1001811910013. The next prime is 1001811910051. The reversal of 1001811910020 is 200191181001.

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, 8348432524 + ... + 8348432643.

It is an arithmetic number, because the mean of its divisors is an integer number (116878056176).

Almost surely, 2^{1001811910020} is an apocalyptic number.

1001811910020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001811910020 is an abundant number, since it is smaller than the sum of its proper divisors (1803261438204).

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

1001811910020 is a wasteful number, since it uses less digits than its factorization.

1001811910020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16696865179 (or 16696865177 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 24.

The spelling of 1001811910020 in words is "one trillion, one billion, eight hundred eleven million, nine hundred ten thousand, twenty".