4020143645 has 16 divisors (see below), whose sum is σ = 5528138880. Its totient is φ = 2749270464.

The previous prime is 4020143639. The next prime is 4020143669. The reversal of 4020143645 is 5463410204.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4020143645 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 140915 + ... + 167024.

It is an arithmetic number, because the mean of its divisors is an integer number (345508680).

Almost surely, 2^4020143645 is an apocalyptic number.

It is an amenable number.

4020143645 is a deficient number, since it is larger than the sum of its proper divisors (1507995235).

4020143645 is a wasteful number, since it uses less digits than its factorization.

4020143645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308324.

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 4020143645 is about 63404.6027114751. The cubic root of 4020143645 is about 1590.0612616982.

Adding to 4020143645 its reverse (5463410204), we get a palindrome (9483553849).

The spelling of 4020143645 in words is "four billion, twenty million, one hundred forty-three thousand, six hundred forty-five".