245323345450021 has 16 divisors (see below), whose sum is σ = 246885244784640. Its totient is φ = 243762571110960.

The previous prime is 245323345450013. The next prime is 245323345450067. The reversal of 245323345450021 is 120054543323542.

It is a cyclic number.

It is not a de Polignac number, because 245323345450021 - 2³ = 245323345450013 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 245323345450021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245323345451021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5313341266 + ... + 5313387436.

It is an arithmetic number, because the mean of its divisors is an integer number (15430327799040).

Almost surely, 2^{245323345450021} is an apocalyptic number.

It is an amenable number.

245323345450021 is a deficient number, since it is larger than the sum of its proper divisors (1561899334619).

245323345450021 is a wasteful number, since it uses less digits than its factorization.

245323345450021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57624.

The product of its (nonzero) digits is 1728000, while the sum is 43.

Adding to 245323345450021 its reverse (120054543323542), we get a palindrome (365377888773563).

The spelling of 245323345450021 in words is "two hundred forty-five trillion, three hundred twenty-three billion, three hundred forty-five million, four hundred fifty thousand, twenty-one".