2019860920 has 128 divisors (see below), whose sum is σ = 5912663040. Its totient is φ = 602173440.

The previous prime is 2019860903. The next prime is 2019860957. The reversal of 2019860920 is 290689102.

It is a super-3 number, since 3×2019860920³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 2019860920.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56584 + ... + 85096.

It is an arithmetic number, because the mean of its divisors is an integer number (46192680).

Almost surely, 2^2019860920 is an apocalyptic number.

2019860920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2019860920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2956331520).

2019860920 is an abundant number, since it is smaller than the sum of its proper divisors (3892802120).

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

2019860920 is a wasteful number, since it uses less digits than its factorization.

2019860920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28565 (or 28561 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 2019860920 is about 44942.8628371625. The cubic root of 2019860920 is about 1264.0778523191.

It can be divided in two parts, 20198 and 60920, that added together give a palindrome (81118).

The spelling of 2019860920 in words is "two billion, nineteen million, eight hundred sixty thousand, nine hundred twenty".