20052223451 has 4 divisors (see below), whose sum is σ = 21594702192. Its totient is φ = 18509744712.

The previous prime is 20052223417. The next prime is 20052223453. The reversal of 20052223451 is 15432225002.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20052223451 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20052223451.

It is not an unprimeable number, because it can be changed into a prime (20052223453) by changing a digit.

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, 771239351 + ... + 771239376.

It is an arithmetic number, because the mean of its divisors is an integer number (5398675548).

Almost surely, 2^20052223451 is an apocalyptic number.

20052223451 is a deficient number, since it is larger than the sum of its proper divisors (1542478741).

20052223451 is a wasteful number, since it uses less digits than its factorization.

20052223451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1542478740.

The product of its (nonzero) digits is 4800, while the sum is 26.

Adding to 20052223451 its reverse (15432225002), we get a palindrome (35484448453).

The spelling of 20052223451 in words is "twenty billion, fifty-two million, two hundred twenty-three thousand, four hundred fifty-one".