32420205451 has 4 divisors (see below), whose sum is σ = 33538143600. Its totient is φ = 31302267304.

The previous prime is 32420205443. The next prime is 32420205539. The reversal of 32420205451 is 15450202423.

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 32420205451 - 2³ = 32420205443 is a prime.

It is a super-2 number, since 2×32420205451² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (32420205551) 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 3 ways as a sum of consecutive naturals, for example, 558969031 + ... + 558969088.

It is an arithmetic number, because the mean of its divisors is an integer number (8384535900).

Almost surely, 2^32420205451 is an apocalyptic number.

32420205451 is a deficient number, since it is larger than the sum of its proper divisors (1117938149).

32420205451 is a wasteful number, since it uses less digits than its factorization.

32420205451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1117938148.

The product of its (nonzero) digits is 9600, while the sum is 28.

Adding to 32420205451 its reverse (15450202423), we get a palindrome (47870407874).

The spelling of 32420205451 in words is "thirty-two billion, four hundred twenty million, two hundred five thousand, four hundred fifty-one".