20354253777445 has 32 divisors (see below), whose sum is σ = 27927782369280. Its totient is φ = 13950515589120.

The previous prime is 20354253777437. The next prime is 20354253777449. The reversal of 20354253777445 is 54477735245302.

It is not a de Polignac number, because 20354253777445 - 2³ = 20354253777437 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20354253777445.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20354253777449) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 947536105 + ... + 947557585.

It is an arithmetic number, because the mean of its divisors is an integer number (872743199040).

Almost surely, 2^{20354253777445} is an apocalyptic number.

It is an amenable number.

20354253777445 is a deficient number, since it is larger than the sum of its proper divisors (7573528591835).

20354253777445 is a wasteful number, since it uses less digits than its factorization.

20354253777445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33205.

The product of its (nonzero) digits is 98784000, while the sum is 58.

The spelling of 20354253777445 in words is "twenty trillion, three hundred fifty-four billion, two hundred fifty-three million, seven hundred seventy-seven thousand, four hundred forty-five".