20617621422 has 64 divisors (see below), whose sum is σ = 42898968576. Its totient is φ = 6598932480.

The previous prime is 20617621397. The next prime is 20617621433. The reversal of 20617621422 is 22412671602.

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 31 ways as a sum of consecutive naturals, for example, 26671828 + ... + 26672600.

It is an arithmetic number, because the mean of its divisors is an integer number (670296384).

Almost surely, 2^20617621422 is an apocalyptic number.

20617621422 is an abundant number, since it is smaller than the sum of its proper divisors (22281347154).

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

20617621422 is a wasteful number, since it uses less digits than its factorization.

20617621422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1745.

The product of its (nonzero) digits is 16128, while the sum is 33.

The spelling of 20617621422 in words is "twenty billion, six hundred seventeen million, six hundred twenty-one thousand, four hundred twenty-two".