20542453406 has 8 divisors (see below), whose sum is σ = 30814537080. Its totient is φ = 10270941048.

The previous prime is 20542453363. The next prime is 20542453411. The reversal of 20542453406 is 60435424502.

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

It is a congruent number.

It is an unprimeable number.

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, 37361 + ... + 206108.

It is an arithmetic number, because the mean of its divisors is an integer number (3851817135).

Almost surely, 2^20542453406 is an apocalyptic number.

20542453406 is a deficient number, since it is larger than the sum of its proper divisors (10272083674).

20542453406 is a wasteful number, since it uses less digits than its factorization.

20542453406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285658.

The product of its (nonzero) digits is 115200, while the sum is 35.

Adding to 20542453406 its reverse (60435424502), we get a palindrome (80977877908).

The spelling of 20542453406 in words is "twenty billion, five hundred forty-two million, four hundred fifty-three thousand, four hundred six".