21354803 has 8 divisors (see below), whose sum is σ = 22521600. Its totient is φ = 20192328.

The previous prime is 21354799. The next prime is 21354847. The reversal of 21354803 is 30845312.

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 21354803 - 2² = 21354799 is a prime.

It is a super-2 number, since 2×21354803² = 912055222337618, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21354103) 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, 16850 + ... + 18072.

It is an arithmetic number, because the mean of its divisors is an integer number (2815200).

Almost surely, 2^21354803 is an apocalyptic number.

21354803 is a deficient number, since it is larger than the sum of its proper divisors (1166797).

21354803 is a wasteful number, since it uses less digits than its factorization.

21354803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2161.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 21354803 is about 4621.1257286510. The cubic root of 21354803 is about 277.4375175180.

The spelling of 21354803 in words is "twenty-one million, three hundred fifty-four thousand, eight hundred three".