20350145444564 has 96 divisors (see below), whose sum is σ = 43552003380480. Its totient is φ = 8216613070848.

The previous prime is 20350145444549. The next prime is 20350145444611. The reversal of 20350145444564 is 46544454105302.

It is a super-2 number, since 2×20350145444564² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10540064 + ... + 12320439.

It is an arithmetic number, because the mean of its divisors is an integer number (453666701880).

Almost surely, 2^{20350145444564} is an apocalyptic number.

It is an amenable number.

20350145444564 is an abundant number, since it is smaller than the sum of its proper divisors (23201857935916).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20350145444564 is a wasteful number, since it uses less digits than its factorization.

20350145444564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22860609 (or 22860607 counting only the distinct ones).

The product of its (nonzero) digits is 4608000, while the sum is 47.

Adding to 20350145444564 its reverse (46544454105302), we get a palindrome (66894599549866).

The spelling of 20350145444564 in words is "twenty trillion, three hundred fifty billion, one hundred forty-five million, four hundred forty-four thousand, five hundred sixty-four".