20103013421 has 4 divisors (see below), whose sum is σ = 20103310752. Its totient is φ = 20102716092.

The previous prime is 20103013409. The next prime is 20103013439. The reversal of 20103013421 is 12431030102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20103013421 is a prime.

It is a super-2 number, since 2×20103013421² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20103013421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20103813421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7280 + ... + 200646.

It is an arithmetic number, because the mean of its divisors is an integer number (5025827688).

Almost surely, 2^20103013421 is an apocalyptic number.

It is an amenable number.

20103013421 is a deficient number, since it is larger than the sum of its proper divisors (297331).

20103013421 is a wasteful number, since it uses less digits than its factorization.

20103013421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297330.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20103013421 its reverse (12431030102), we get a palindrome (32534043523).

The spelling of 20103013421 in words is "twenty billion, one hundred three million, thirteen thousand, four hundred twenty-one".