20045324251 has 8 divisors (see below), whose sum is σ = 20924584704. Its totient is φ = 19166707560.

The previous prime is 20045324249. The next prime is 20045324279. The reversal of 20045324251 is 15242354002.

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 20045324251 - 2¹ = 20045324249 is a prime.

It is a super-2 number, since 2×20045324251² (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 (20045324051) 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, 96751 + ... + 222376.

It is an arithmetic number, because the mean of its divisors is an integer number (2615573088).

Almost surely, 2^20045324251 is an apocalyptic number.

20045324251 is a deficient number, since it is larger than the sum of its proper divisors (879260453).

20045324251 is a wasteful number, since it uses less digits than its factorization.

20045324251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321881.

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

Adding to 20045324251 its reverse (15242354002), we get a palindrome (35287678253).

The spelling of 20045324251 in words is "twenty billion, forty-five million, three hundred twenty-four thousand, two hundred fifty-one".