20350352621653 has 16 divisors (see below), whose sum is σ = 20491890784704. Its totient is φ = 20209278418560.

The previous prime is 20350352621597. The next prime is 20350352621693. The reversal of 20350352621653 is 35612625305302.

It is a cyclic number.

It is not a de Polignac number, because 20350352621653 - 2²¹ = 20350350524501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20350352621693) 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, 227391951 + ... + 227481427.

It is an arithmetic number, because the mean of its divisors is an integer number (1280743174044).

Almost surely, 2^{20350352621653} is an apocalyptic number.

It is an amenable number.

20350352621653 is a deficient number, since it is larger than the sum of its proper divisors (141538163051).

20350352621653 is a wasteful number, since it uses less digits than its factorization.

20350352621653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92052.

The product of its (nonzero) digits is 972000, while the sum is 43.

Adding to 20350352621653 its reverse (35612625305302), we get a palindrome (55962977926955).

The spelling of 20350352621653 in words is "twenty trillion, three hundred fifty billion, three hundred fifty-two million, six hundred twenty-one thousand, six hundred fifty-three".