20434080233551 has 4 divisors (see below), whose sum is σ = 21509558140600. Its totient is φ = 19358602326504.

The previous prime is 20434080233537. The next prime is 20434080233563. The reversal of 20434080233551 is 15533208043402.

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

It is a cyclic number.

It is not a de Polignac number, because 20434080233551 - 2¹⁷ = 20434080102479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20434080233351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 537738953496 + ... + 537738953533.

It is an arithmetic number, because the mean of its divisors is an integer number (5377389535150).

Almost surely, 2^{20434080233551} is an apocalyptic number.

20434080233551 is a deficient number, since it is larger than the sum of its proper divisors (1075477907049).

20434080233551 is a wasteful number, since it uses less digits than its factorization.

20434080233551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1075477907048.

The product of its (nonzero) digits is 345600, while the sum is 40.

Adding to 20434080233551 its reverse (15533208043402), we get a palindrome (35967288276953).

The spelling of 20434080233551 in words is "twenty trillion, four hundred thirty-four billion, eighty million, two hundred thirty-three thousand, five hundred fifty-one".