21986103 has 8 divisors (see below), whose sum is σ = 30107248. Its totient is φ = 14261184.

The previous prime is 21986101. The next prime is 21986131. The reversal of 21986103 is 30168912.

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

It is not a de Polignac number, because 21986103 - 2¹ = 21986101 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 (21986101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98926 + ... + 99147.

It is an arithmetic number, because the mean of its divisors is an integer number (3763406).

Almost surely, 2^21986103 is an apocalyptic number.

21986103 is a deficient number, since it is larger than the sum of its proper divisors (8121145).

21986103 is a wasteful number, since it uses less digits than its factorization.

21986103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198113.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 21986103 is about 4688.9341006246. The cubic root of 21986103 is about 280.1449207282.

The spelling of 21986103 in words is "twenty-one million, nine hundred eighty-six thousand, one hundred three".