20628458403445 has 32 divisors (see below), whose sum is σ = 25404450567552. Its totient is φ = 16074977421312.

The previous prime is 20628458403407. The next prime is 20628458403451. The reversal of 20628458403445 is 54430485482602.

It is a cyclic number.

It is not a de Polignac number, because 20628458403445 - 2²⁵ = 20628424849013 is a prime.

It is a super-2 number, since 2×20628458403445² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 87647094 + ... + 87882136.

It is an arithmetic number, because the mean of its divisors is an integer number (793889080236).

Almost surely, 2^{20628458403445} is an apocalyptic number.

It is an amenable number.

20628458403445 is a deficient number, since it is larger than the sum of its proper divisors (4775992164107).

20628458403445 is a wasteful number, since it uses less digits than its factorization.

20628458403445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238101.

The product of its (nonzero) digits is 29491200, while the sum is 55.

The spelling of 20628458403445 in words is "twenty trillion, six hundred twenty-eight billion, four hundred fifty-eight million, four hundred three thousand, four hundred forty-five".