20350352621643 has 16 divisors (see below), whose sum is σ = 31341719546496. Its totient is φ = 11608044275840.

The previous prime is 20350352621597. The next prime is 20350352621693. The reversal of 20350352621643 is 34612625305302.

It is a cyclic number.

It is not a de Polignac number, because 20350352621643 - 2²⁶ = 20350285512779 is a prime.

It is a super-2 number, since 2×20350352621643² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20350352621595 and 20350352621604.

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, 18137568621 + ... + 18137569742.

It is an arithmetic number, because the mean of its divisors is an integer number (1958857471656).

Almost surely, 2^{20350352621643} is an apocalyptic number.

20350352621643 is a deficient number, since it is larger than the sum of its proper divisors (10991366924853).

20350352621643 is a wasteful number, since it uses less digits than its factorization.

20350352621643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36275138394.

The product of its (nonzero) digits is 777600, while the sum is 42.

Adding to 20350352621643 its reverse (34612625305302), we get a palindrome (54962977926945).

The spelling of 20350352621643 in words is "twenty trillion, three hundred fifty billion, three hundred fifty-two million, six hundred twenty-one thousand, six hundred forty-three".