4020556387 has 2 divisors, whose sum is σ = 4020556388. Its totient is φ = 4020556386.

The previous prime is 4020556381. The next prime is 4020556429. The reversal of 4020556387 is 7836550204.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4020556387 - 2³¹ = 1873072739 is a prime.

It is a super-2 number, since 2×4020556387² = 32329747322092987538, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (4020556381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2010278193 + 2010278194.

It is an arithmetic number, because the mean of its divisors is an integer number (2010278194).

Almost surely, 2^4020556387 is an apocalyptic number.

4020556387 is a deficient number, since it is larger than the sum of its proper divisors (1).

4020556387 is an equidigital number, since it uses as much as digits as its factorization.

4020556387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 201600, while the sum is 40.

The square root of 4020556387 is about 63407.8574547351. The cubic root of 4020556387 is about 1590.1156762221.

The spelling of 4020556387 in words is "four billion, twenty million, five hundred fifty-six thousand, three hundred eighty-seven".