20354642642201 has 24 divisors (see below), whose sum is σ = 23780600671464. Its totient is φ = 17371132369920.

The previous prime is 20354642642197. The next prime is 20354642642233. The reversal of 20354642642201 is 10224624645302.

It can be written as a sum of positive squares in 4 ways, for example, as 3889908121225 + 16464734520976 = 1972285^2 + 4057676^2 .

It is not a de Polignac number, because 20354642642201 - 2² = 20354642642197 is a prime.

It is a super-2 number, since 2×20354642642201² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20354642644201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 447991781 + ... + 448037213.

It is an arithmetic number, because the mean of its divisors is an integer number (990858361311).

Almost surely, 2^{20354642642201} is an apocalyptic number.

It is an amenable number.

20354642642201 is a deficient number, since it is larger than the sum of its proper divisors (3425958029263).

20354642642201 is a wasteful number, since it uses less digits than its factorization.

20354642642201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84921 (or 84914 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 41.

The spelling of 20354642642201 in words is "twenty trillion, three hundred fifty-four billion, six hundred forty-two million, six hundred forty-two thousand, two hundred one".