20541994264385 has 16 divisors (see below), whose sum is σ = 26930254548672. Its totient is φ = 14918011857600.

The previous prime is 20541994264381. The next prime is 20541994264423. The reversal of 20541994264385 is 58346249914502.

It is not a de Polignac number, because 20541994264385 - 2² = 20541994264381 is a prime.

It is a super-3 number, since 3×20541994264385³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20541994264381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 270215834 + ... + 270291843.

It is an arithmetic number, because the mean of its divisors is an integer number (1683140909292).

Almost surely, 2^{20541994264385} is an apocalyptic number.

It is an amenable number.

20541994264385 is a deficient number, since it is larger than the sum of its proper divisors (6388260284287).

20541994264385 is a wasteful number, since it uses less digits than its factorization.

20541994264385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540508384.

The product of its (nonzero) digits is 74649600, while the sum is 62.

The spelling of 20541994264385 in words is "twenty trillion, five hundred forty-one billion, nine hundred ninety-four million, two hundred sixty-four thousand, three hundred eighty-five".