20861224265 has 32 divisors (see below), whose sum is σ = 29174432256. Its totient is φ = 14022927360.

The previous prime is 20861224259. The next prime is 20861224271. The reversal of 20861224265 is 56242216802.

It is an interprime number because it is at equal distance from previous prime (20861224259) and next prime (20861224271).

It is not a de Polignac number, because 20861224265 - 2⁸ = 20861224009 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 2520524 + ... + 2528786.

It is an arithmetic number, because the mean of its divisors is an integer number (911701008).

Almost surely, 2^20861224265 is an apocalyptic number.

It is an amenable number.

20861224265 is a deficient number, since it is larger than the sum of its proper divisors (8313207991).

20861224265 is a wasteful number, since it uses less digits than its factorization.

20861224265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9689.

The product of its (nonzero) digits is 92160, while the sum is 38.

The spelling of 20861224265 in words is "twenty billion, eight hundred sixty-one million, two hundred twenty-four thousand, two hundred sixty-five".