20865007422 has 144 divisors (see below), whose sum is σ = 54138052800. Its totient is φ = 5788298880.

The previous prime is 20865007411. The next prime is 20865007439. The reversal of 20865007422 is 22470056802.

20865007422 is a `hidden beast` number, since 2 + 0 + 86 + 500 + 74 + 2 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 4247904 + ... + 4252812.

It is an arithmetic number, because the mean of its divisors is an integer number (375958700).

Almost surely, 2^20865007422 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20865007422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27069026400).

20865007422 is an abundant number, since it is smaller than the sum of its proper divisors (33273045378).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20865007422 is a wasteful number, since it uses less digits than its factorization.

20865007422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5071 (or 5061 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The spelling of 20865007422 in words is "twenty billion, eight hundred sixty-five million, seven thousand, four hundred twenty-two".