20622651439 has 4 divisors (see below), whose sum is σ = 22209009256. Its totient is φ = 19036293624.

The previous prime is 20622651383. The next prime is 20622651449. The reversal of 20622651439 is 93415622602.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20622651439 - 2⁹ = 20622650927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20622651449) 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 3 ways as a sum of consecutive naturals, for example, 793178889 + ... + 793178914.

It is an arithmetic number, because the mean of its divisors is an integer number (5552252314).

Almost surely, 2^20622651439 is an apocalyptic number.

20622651439 is a deficient number, since it is larger than the sum of its proper divisors (1586357817).

20622651439 is a wasteful number, since it uses less digits than its factorization.

20622651439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1586357816.

The product of its (nonzero) digits is 155520, while the sum is 40.

The spelling of 20622651439 in words is "twenty billion, six hundred twenty-two million, six hundred fifty-one thousand, four hundred thirty-nine".