20350352621644 has 24 divisors (see below), whose sum is σ = 35855333045280. Its totient is φ = 10106070268416.

The previous prime is 20350352621597. The next prime is 20350352621693. The reversal of 20350352621644 is 44612625305302.

It is a self number, because there is not a number n which added to its sum of digits gives 20350352621644.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11487589 + ... + 13140220.

It is an arithmetic number, because the mean of its divisors is an integer number (1493972210220).

Almost surely, 2^{20350352621644} is an apocalyptic number.

It is an amenable number.

20350352621644 is a deficient number, since it is larger than the sum of its proper divisors (15504980423636).

20350352621644 is a wasteful number, since it uses less digits than its factorization.

20350352621644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24629217 (or 24629215 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 43.

Adding to 20350352621644 its reverse (44612625305302), we get a palindrome (64962977926946).

The spelling of 20350352621644 in words is "twenty trillion, three hundred fifty billion, three hundred fifty-two million, six hundred twenty-one thousand, six hundred forty-four".