4019819820 has 24 divisors (see below), whose sum is σ = 11255495664. Its totient is φ = 1071951936.

The previous prime is 4019819819. The next prime is 4019819827. The reversal of 4019819820 is 289189104.

It is a super-4 number, since 4×4019819820⁴ (a number of 40 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (4019819827) 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, 33498439 + ... + 33498558.

It is an arithmetic number, because the mean of its divisors is an integer number (468978986).

Almost surely, 2^4019819820 is an apocalyptic number.

It is an amenable number.

4019819820 is an abundant number, since it is smaller than the sum of its proper divisors (7235675844).

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

4019819820 is a wasteful number, since it uses less digits than its factorization.

4019819820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66997009 (or 66997007 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 42.

The square root of 4019819820 is about 63402.0490205167. The cubic root of 4019819820 is about 1590.0185670867.

The spelling of 4019819820 in words is "four billion, nineteen million, eight hundred nineteen thousand, eight hundred twenty".