4020221824 has 32 divisors (see below), whose sum is σ = 8047047240. Its totient is φ = 2000570880.

The previous prime is 4020221813. The next prime is 4020221839. The reversal of 4020221824 is 4281220204.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47419 + ... + 101434.

Almost surely, 2^4020221824 is an apocalyptic number.

It is an amenable number.

4020221824 is an abundant number, since it is smaller than the sum of its proper divisors (4026825416).

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

4020221824 is a wasteful number, since it uses less digits than its factorization.

4020221824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149078 (or 149066 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 25.

The square root of 4020221824 is about 63405.2192173483. The cubic root of 4020221824 is about 1590.0715688418.

It can be divided in two parts, 40202 and 21824, that added together give a palindrome (62026).

The spelling of 4020221824 in words is "four billion, twenty million, two hundred twenty-one thousand, eight hundred twenty-four".