4020143646 has 16 divisors (see below), whose sum is σ = 8513245584. Its totient is φ = 1261221504.

The previous prime is 4020143639. The next prime is 4020143669. The reversal of 4020143646 is 6463410204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19706485 + ... + 19706688.

It is an arithmetic number, because the mean of its divisors is an integer number (532077849).

Almost surely, 2^4020143646 is an apocalyptic number.

4020143646 is an abundant number, since it is smaller than the sum of its proper divisors (4493101938).

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

4020143646 is a wasteful number, since it uses less digits than its factorization.

4020143646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39413195.

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 4020143646 is about 63404.6027193610. The cubic root of 4020143646 is about 1590.0612618301.

The spelling of 4020143646 in words is "four billion, twenty million, one hundred forty-three thousand, six hundred forty-six".