20461500542053 has 4 divisors (see below), whose sum is σ = 20461643779468. Its totient is φ = 20461357304640.

The previous prime is 20461500542017. The next prime is 20461500542081. The reversal of 20461500542053 is 35024500516402.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19244523112164 + 1216977429889 = 4386858^2 + 1103167^2 .

It is a cyclic number.

It is not a de Polignac number, because 20461500542053 - 2³³ = 20452910607461 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 (20461500549053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71404218 + ... + 71690203.

It is an arithmetic number, because the mean of its divisors is an integer number (5115410944867).

Almost surely, 2^{20461500542053} is an apocalyptic number.

It is an amenable number.

20461500542053 is a deficient number, since it is larger than the sum of its proper divisors (143237415).

20461500542053 is a wasteful number, since it uses less digits than its factorization.

20461500542053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143237414.

The product of its (nonzero) digits is 144000, while the sum is 37.

The spelling of 20461500542053 in words is "twenty trillion, four hundred sixty-one billion, five hundred million, five hundred forty-two thousand, fifty-three".