20103421 has 8 divisors (see below), whose sum is σ = 21687680. Its totient is φ = 18524592.

The previous prime is 20103383. The next prime is 20103427. The reversal of 20103421 is 12430102.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20103421 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20103427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9760 + ... + 11638.

It is an arithmetic number, because the mean of its divisors is an integer number (2710960).

Almost surely, 2^20103421 is an apocalyptic number.

It is an amenable number.

20103421 is a deficient number, since it is larger than the sum of its proper divisors (1584259).

20103421 is a wasteful number, since it uses less digits than its factorization.

20103421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2715.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 20103421 is about 4483.6838648593. The cubic root of 20103421 is about 271.9088371326.

Adding to 20103421 its reverse (12430102), we get a palindrome (32533523).

The spelling of 20103421 in words is "twenty million, one hundred three thousand, four hundred twenty-one".