20654075638 has 8 divisors (see below), whose sum is σ = 35406986832. Its totient is φ = 8851746696.

The previous prime is 20654075627. The next prime is 20654075669. The reversal of 20654075638 is 83657045602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 737645545 + ... + 737645572.

It is an arithmetic number, because the mean of its divisors is an integer number (4425873354).

Almost surely, 2^20654075638 is an apocalyptic number.

20654075638 is a deficient number, since it is larger than the sum of its proper divisors (14752911194).

20654075638 is a wasteful number, since it uses less digits than its factorization.

20654075638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1475291126.

The product of its (nonzero) digits is 1209600, while the sum is 46.

The spelling of 20654075638 in words is "twenty billion, six hundred fifty-four million, seventy-five thousand, six hundred thirty-eight".