20895027747 has 16 divisors (see below), whose sum is σ = 30395813760. Its totient is φ = 12662384000.

The previous prime is 20895027733. The next prime is 20895027841. The reversal of 20895027747 is 74772059802.

It is a cyclic number.

It is not a de Polignac number, because 20895027747 - 2¹¹ = 20895025699 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20895027747.

It is not an unprimeable number, because it can be changed into a prime (20895027707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 383704 + ... + 434762.

It is an arithmetic number, because the mean of its divisors is an integer number (1899738360).

Almost surely, 2^20895027747 is an apocalyptic number.

20895027747 is a deficient number, since it is larger than the sum of its proper divisors (9500786013).

20895027747 is a wasteful number, since it uses less digits than its factorization.

20895027747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63474.

The product of its (nonzero) digits is 1975680, while the sum is 51.

The spelling of 20895027747 in words is "twenty billion, eight hundred ninety-five million, twenty-seven thousand, seven hundred forty-seven".