20402103 has 8 divisors (see below), whose sum is σ = 27609088. Its totient is φ = 13398264.

The previous prime is 20402099. The next prime is 20402119. The reversal of 20402103 is 30120402.

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

It is not a de Polignac number, because 20402103 - 2² = 20402099 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 (20402153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50551 + ... + 50952.

It is an arithmetic number, because the mean of its divisors is an integer number (3451136).

Almost surely, 2^20402103 is an apocalyptic number.

20402103 is a deficient number, since it is larger than the sum of its proper divisors (7206985).

20402103 is a wasteful number, since it uses less digits than its factorization.

20402103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101573.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 20402103 is about 4516.8687162679. The cubic root of 20402103 is about 273.2488305441.

Adding to 20402103 its reverse (30120402), we get a palindrome (50522505).

The spelling of 20402103 in words is "twenty million, four hundred two thousand, one hundred three".