4020073645 has 16 divisors (see below), whose sum is σ = 5691091968. Its totient is φ = 2667697920.

The previous prime is 4020073517. The next prime is 4020073661. The reversal of 4020073645 is 5463700204.

It is not a de Polignac number, because 4020073645 - 2⁷ = 4020073517 is a prime.

It is a super-3 number, since 3×4020073645³ (a number of 30 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1851484 + ... + 1853653.

It is an arithmetic number, because the mean of its divisors is an integer number (355693248).

Almost surely, 2^4020073645 is an apocalyptic number.

It is an amenable number.

4020073645 is a deficient number, since it is larger than the sum of its proper divisors (1671018323).

4020073645 is a wasteful number, since it uses less digits than its factorization.

4020073645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3705180.

The product of its (nonzero) digits is 20160, while the sum is 31.

The square root of 4020073645 is about 63404.0506986738. The cubic root of 4020073645 is about 1590.0520327631.

Adding to 4020073645 its reverse (5463700204), we get a palindrome (9483773849).

The spelling of 4020073645 in words is "four billion, twenty million, seventy-three thousand, six hundred forty-five".