20720103 has 8 divisors (see below), whose sum is σ = 27686400. Its totient is φ = 13783608.

The previous prime is 20720087. The next prime is 20720107. The reversal of 20720103 is 30102702.

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

It is not a de Polignac number, because 20720103 - 2⁴ = 20720087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20720107) 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, 5773 + ... + 8646.

It is an arithmetic number, because the mean of its divisors is an integer number (3460800).

Almost surely, 2^20720103 is an apocalyptic number.

20720103 is a deficient number, since it is larger than the sum of its proper divisors (6966297).

20720103 is a wasteful number, since it uses less digits than its factorization.

20720103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14901.

The product of its (nonzero) digits is 84, while the sum is 15.

The square root of 20720103 is about 4551.9339845828. The cubic root of 20720103 is about 274.6611937738.

Adding to 20720103 its reverse (30102702), we get a palindrome (50822805).

The spelling of 20720103 in words is "twenty million, seven hundred twenty thousand, one hundred three".