20421124103 has 8 divisors (see below), whose sum is σ = 21310462176. Its totient is φ = 19531908000.

The previous prime is 20421124079. The next prime is 20421124117. The reversal of 20421124103 is 30142112402.

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

It is a cyclic number.

It is not a de Polignac number, because 20421124103 - 2³² = 16126156807 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 (20421129103) 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, 534953 + ... + 571853.

It is an arithmetic number, because the mean of its divisors is an integer number (2663807772).

Almost surely, 2^20421124103 is an apocalyptic number.

20421124103 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20421124103 is a deficient number, since it is larger than the sum of its proper divisors (889338073).

20421124103 is a wasteful number, since it uses less digits than its factorization.

20421124103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60985.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 20421124103 its reverse (30142112402), we get a palindrome (50563236505).

The spelling of 20421124103 in words is "twenty billion, four hundred twenty-one million, one hundred twenty-four thousand, one hundred three".