20164035646 has 32 divisors (see below), whose sum is σ = 34367846400. Its totient is φ = 8821058400.

The previous prime is 20164035643. The next prime is 20164035649. The reversal of 20164035646 is 64653046102.

It is an interprime number because it is at equal distance from previous prime (20164035643) and next prime (20164035649).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20164035643) 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, 372430 + ... + 423121.

It is an arithmetic number, because the mean of its divisors is an integer number (1073995200).

Almost surely, 2^20164035646 is an apocalyptic number.

20164035646 is a deficient number, since it is larger than the sum of its proper divisors (14203810754).

20164035646 is a wasteful number, since it uses less digits than its factorization.

20164035646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795624.

The product of its (nonzero) digits is 103680, while the sum is 37.

The spelling of 20164035646 in words is "twenty billion, one hundred sixty-four million, thirty-five thousand, six hundred forty-six".