20147355103 has 4 divisors (see below), whose sum is σ = 21023327088. Its totient is φ = 19271383120.

The previous prime is 20147355101. The next prime is 20147355127. The reversal of 20147355103 is 30155374102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20147355103 - 2¹ = 20147355101 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 (20147355101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 437985958 + ... + 437986003.

It is an arithmetic number, because the mean of its divisors is an integer number (5255831772).

Almost surely, 2^20147355103 is an apocalyptic number.

20147355103 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20147355103 is a deficient number, since it is larger than the sum of its proper divisors (875971985).

20147355103 is an equidigital number, since it uses as much as digits as its factorization.

20147355103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 875971984.

The product of its (nonzero) digits is 12600, while the sum is 31.

The spelling of 20147355103 in words is "twenty billion, one hundred forty-seven million, three hundred fifty-five thousand, one hundred three".