20360642156645 has 16 divisors (see below), whose sum is σ = 28002268857600. Its totient is φ = 13922031957504.

The previous prime is 20360642156623. The next prime is 20360642156669. The reversal of 20360642156645 is 54665124606302.

It is a cyclic number.

It is not a de Polignac number, because 20360642156645 - 2¹⁰ = 20360642155621 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20360642156593 and 20360642156602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 823971545 + ... + 823996254.

It is an arithmetic number, because the mean of its divisors is an integer number (1750141803600).

Almost surely, 2^{20360642156645} is an apocalyptic number.

It is an amenable number.

20360642156645 is a deficient number, since it is larger than the sum of its proper divisors (7641626700955).

20360642156645 is a wasteful number, since it uses less digits than its factorization.

20360642156645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1647968164.

The product of its (nonzero) digits is 6220800, while the sum is 50.

The spelling of 20360642156645 in words is "twenty trillion, three hundred sixty billion, six hundred forty-two million, one hundred fifty-six thousand, six hundred forty-five".