20542223035451 has 8 divisors (see below), whose sum is σ = 22124246847024. Its totient is φ = 18960463910880.

The previous prime is 20542223035409. The next prime is 20542223035457. The reversal of 20542223035451 is 15453032224502.

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 20542223035451 - 2³⁸ = 20267345128507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20542223035457) 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, 66010541 + ... + 66321006.

It is an arithmetic number, because the mean of its divisors is an integer number (2765530855878).

Almost surely, 2^{20542223035451} is an apocalyptic number.

20542223035451 is a deficient number, since it is larger than the sum of its proper divisors (1582023811573).

20542223035451 is a wasteful number, since it uses less digits than its factorization.

20542223035451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132343501.

The product of its (nonzero) digits is 288000, while the sum is 38.

Adding to 20542223035451 its reverse (15453032224502), we get a palindrome (35995255259953).

The spelling of 20542223035451 in words is "twenty trillion, five hundred forty-two billion, two hundred twenty-three million, thirty-five thousand, four hundred fifty-one".