20807846455 has 8 divisors (see below), whose sum is σ = 27239362704. Its totient is φ = 15132979200.

The previous prime is 20807846453. The next prime is 20807846459. The reversal of 20807846455 is 55464870802.

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

It is not a de Polignac number, because 20807846455 - 2¹ = 20807846453 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20807846399 and 20807846408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20807846453) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 189162186 + ... + 189162295.

It is an arithmetic number, because the mean of its divisors is an integer number (3404920338).

Almost surely, 2^20807846455 is an apocalyptic number.

20807846455 is a deficient number, since it is larger than the sum of its proper divisors (6431516249).

20807846455 is a wasteful number, since it uses less digits than its factorization.

20807846455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378324497.

The product of its (nonzero) digits is 2150400, while the sum is 49.

The spelling of 20807846455 in words is "twenty billion, eight hundred seven million, eight hundred forty-six thousand, four hundred fifty-five".