21434103 has 24 divisors (see below), whose sum is σ = 32825520. Its totient is φ = 13453440.

The previous prime is 21434099. The next prime is 21434107. The reversal of 21434103 is 30143412.

It is an interprime number because it is at equal distance from previous prime (21434099) and next prime (21434107).

It is not a de Polignac number, because 21434103 - 2² = 21434099 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21434107) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9700 + ... + 11702.

It is an arithmetic number, because the mean of its divisors is an integer number (1367730).

Almost surely, 2^21434103 is an apocalyptic number.

21434103 is a deficient number, since it is larger than the sum of its proper divisors (11391417).

21434103 is a wasteful number, since it uses less digits than its factorization.

21434103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2079 (or 2076 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 21434103 is about 4629.6979383109. The cubic root of 21434103 is about 277.7805101183.

Adding to 21434103 its reverse (30143412), we get a palindrome (51577515).

The spelling of 21434103 in words is "twenty-one million, four hundred thirty-four thousand, one hundred three".