20542453441 has 8 divisors (see below), whose sum is σ = 20599959744. Its totient is φ = 20485005840.

The previous prime is 20542453423. The next prime is 20542453447. The reversal of 20542453441 is 14435424502.

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 20542453441 - 2²¹ = 20540356289 is a prime.

It is a super-4 number, since 4×20542453441⁴ (a number of 42 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20542453397 and 20542453406.

It is not an unprimeable number, because it can be changed into a prime (20542453447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 739636 + ... + 766906.

It is an arithmetic number, because the mean of its divisors is an integer number (2574994968).

Almost surely, 2^20542453441 is an apocalyptic number.

It is an amenable number.

20542453441 is a deficient number, since it is larger than the sum of its proper divisors (57506303).

20542453441 is a wasteful number, since it uses less digits than its factorization.

20542453441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29351.

The product of its (nonzero) digits is 76800, while the sum is 34.

Adding to 20542453441 its reverse (14435424502), we get a palindrome (34977877943).

The spelling of 20542453441 in words is "twenty billion, five hundred forty-two million, four hundred fifty-three thousand, four hundred forty-one".