201911020 has 24 divisors (see below), whose sum is σ = 442449504. Its totient is φ = 77252736.

The previous prime is 201910987. The next prime is 201911041. The reversal of 201911020 is 20119102.

It is a junction number, because it is equal to n+sod(n) for n = 201910985 and 201911003.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 219009 + ... + 219928.

It is an arithmetic number, because the mean of its divisors is an integer number (18435396).

Almost surely, 2^201911020 is an apocalyptic number.

201911020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201911020 is an abundant number, since it is smaller than the sum of its proper divisors (240538484).

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

201911020 is a wasteful number, since it uses less digits than its factorization.

201911020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438969 (or 438967 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 201911020 is about 14209.5397532784. The cubic root of 201911020 is about 586.6602652251.

The spelling of 201911020 in words is "two hundred one million, nine hundred eleven thousand, twenty".