20351644661103 has 8 divisors (see below), whose sum is σ = 31012029959808. Its totient is φ = 11629511234904.

The previous prime is 20351644661093. The next prime is 20351644661111. The reversal of 20351644661103 is 30116644615302.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20351644661103 - 2⁴ = 20351644661087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20351644661143) 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, 484562968101 + ... + 484562968142.

It is an arithmetic number, because the mean of its divisors is an integer number (3876503744976).

Almost surely, 2^{20351644661103} is an apocalyptic number.

20351644661103 is a deficient number, since it is larger than the sum of its proper divisors (10660385298705).

20351644661103 is an equidigital number, since it uses as much as digits as its factorization.

20351644661103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 969125936253.

The product of its (nonzero) digits is 311040, while the sum is 42.

The spelling of 20351644661103 in words is "twenty trillion, three hundred fifty-one billion, six hundred forty-four million, six hundred sixty-one thousand, one hundred three".