19300021 has 8 divisors (see below), whose sum is σ = 21137760. Its totient is φ = 17512752.

The previous prime is 19300019. The next prime is 19300027. The reversal of 19300021 is 12000391.

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 19300021 - 2¹ = 19300019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19299968 and 19300004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19300027) 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, 11815 + ... + 13348.

It is an arithmetic number, because the mean of its divisors is an integer number (2642220).

Almost surely, 2^19300021 is an apocalyptic number.

It is an amenable number.

19300021 is a deficient number, since it is larger than the sum of its proper divisors (1837739).

19300021 is a wasteful number, since it uses less digits than its factorization.

19300021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25235.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 19300021 is about 4393.1789173672. The cubic root of 19300021 is about 268.2373565511.

The spelling of 19300021 in words is "nineteen million, three hundred thousand, twenty-one".