20350145513506 has 16 divisors (see below), whose sum is σ = 30702191284800. Its totient is φ = 10116083770128.

The previous prime is 20350145513471. The next prime is 20350145513507. The reversal of 20350145513506 is 60531554105302.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20350145513507) 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, 21019765 + ... + 21966583.

It is an arithmetic number, because the mean of its divisors is an integer number (1918886955300).

Almost surely, 2^{20350145513506} is an apocalyptic number.

20350145513506 is a deficient number, since it is larger than the sum of its proper divisors (10352045771294).

20350145513506 is a wasteful number, since it uses less digits than its factorization.

20350145513506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1009113.

The product of its (nonzero) digits is 270000, while the sum is 40.

Adding to 20350145513506 its reverse (60531554105302), we get a palindrome (80881699618808).

The spelling of 20350145513506 in words is "twenty trillion, three hundred fifty billion, one hundred forty-five million, five hundred thirteen thousand, five hundred six".