20322603451 has 4 divisors (see below), whose sum is σ = 20550947400. Its totient is φ = 20094259504.

The previous prime is 20322603439. The next prime is 20322603491. The reversal of 20322603451 is 15430622302.

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 20322603451 - 2³¹ = 18175119803 is a prime.

It is a super-2 number, since 2×20322603451² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20322603401) 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, 114171841 + ... + 114172018.

It is an arithmetic number, because the mean of its divisors is an integer number (5137736850).

Almost surely, 2^20322603451 is an apocalyptic number.

20322603451 is a deficient number, since it is larger than the sum of its proper divisors (228343949).

20322603451 is an equidigital number, since it uses as much as digits as its factorization.

20322603451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228343948.

The product of its (nonzero) digits is 8640, while the sum is 28.

The spelling of 20322603451 in words is "twenty billion, three hundred twenty-two million, six hundred three thousand, four hundred fifty-one".