20155543404101 has 8 divisors (see below), whose sum is σ = 23034934627584. Its totient is φ = 17276159150640.

The previous prime is 20155543404083. The next prime is 20155543404121. The reversal of 20155543404101 is 10140434555102.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20155543404101 - 2⁶ = 20155543404037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20155543404121) 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, 8354996 + ... + 10493666.

It is an arithmetic number, because the mean of its divisors is an integer number (2879366828448).

Almost surely, 2^{20155543404101} is an apocalyptic number.

It is an amenable number.

20155543404101 is a deficient number, since it is larger than the sum of its proper divisors (2879391223483).

20155543404101 is a wasteful number, since it uses less digits than its factorization.

20155543404101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3485011.

The product of its (nonzero) digits is 48000, while the sum is 35.

Adding to 20155543404101 its reverse (10140434555102), we get a palindrome (30295977959203).

The spelling of 20155543404101 in words is "twenty trillion, one hundred fifty-five billion, five hundred forty-three million, four hundred four thousand, one hundred one".