2019101020 has 24 divisors (see below), whose sum is σ = 4242193200. Its totient is φ = 807244032.

The previous prime is 2019101003. The next prime is 2019101027. The reversal of 2019101020 is 201019102.

It is a junction number, because it is equal to n+sod(n) for n = 2019100985 and 2019101003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2019101027) 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, 18871 + ... + 66289.

It is an arithmetic number, because the mean of its divisors is an integer number (176758050).

Almost surely, 2^2019101020 is an apocalyptic number.

2019101020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2019101020 is an abundant number, since it is smaller than the sum of its proper divisors (2223092180).

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

2019101020 is a wasteful number, since it uses less digits than its factorization.

2019101020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49557 (or 49555 counting only the distinct ones).

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

The square root of 2019101020 is about 44934.4079742907. The cubic root of 2019101020 is about 1263.9193111647.

The spelling of 2019101020 in words is "two billion, nineteen million, one hundred one thousand, twenty".