4021686507 has 16 divisors (see below), whose sum is σ = 5491791360. Its totient is φ = 2617024800.

The previous prime is 4021686503. The next prime is 4021686517. The reversal of 4021686507 is 7056861204.

It is not a de Polignac number, because 4021686507 - 2² = 4021686503 is a prime.

It is a super-2 number, since 2×4021686507² = 32347924721171722098, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (4021686503) by changing a digit.

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, 59907 + ... + 107852.

It is an arithmetic number, because the mean of its divisors is an integer number (343236960).

Almost surely, 2^4021686507 is an apocalyptic number.

4021686507 is a deficient number, since it is larger than the sum of its proper divisors (1470104853).

4021686507 is a wasteful number, since it uses less digits than its factorization.

4021686507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167954.

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 4021686507 is about 63416.7683424502. The cubic root of 4021686507 is about 1590.2646484048.

The spelling of 4021686507 in words is "four billion, twenty-one million, six hundred eighty-six thousand, five hundred seven".