20542442053 has 8 divisors (see below), whose sum is σ = 23492423360. Its totient is φ = 17596297440.

The previous prime is 20542442003. The next prime is 20542442087. The reversal of 20542442053 is 35024424502.

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 20542442053 - 2¹⁷ = 20542310981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20542442003) 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, 947688 + ... + 969121.

It is an arithmetic number, because the mean of its divisors is an integer number (2936552920).

Almost surely, 2^20542442053 is an apocalyptic number.

It is an amenable number.

20542442053 is a deficient number, since it is larger than the sum of its proper divisors (2949981307).

20542442053 is a wasteful number, since it uses less digits than its factorization.

20542442053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1918347.

The product of its (nonzero) digits is 38400, while the sum is 31.

Adding to 20542442053 its reverse (35024424502), we get a palindrome (55566866555).

The spelling of 20542442053 in words is "twenty billion, five hundred forty-two million, four hundred forty-two thousand, fifty-three".