21030680019 has 16 divisors (see below), whose sum is σ = 28701388800. Its totient is φ = 13691543040.

The previous prime is 21030679979. The next prime is 21030680029. The reversal of 21030680019 is 91008603012.

It is not a de Polignac number, because 21030680019 - 2¹⁶ = 21030614483 is a prime.

It is a super-2 number, since 2×21030680019² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21030680029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102787 + ... + 229404.

It is an arithmetic number, because the mean of its divisors is an integer number (1793836800).

Almost surely, 2^21030680019 is an apocalyptic number.

21030680019 is a deficient number, since it is larger than the sum of its proper divisors (7670708781).

21030680019 is a wasteful number, since it uses less digits than its factorization.

21030680019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332690.

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

The spelling of 21030680019 in words is "twenty-one billion, thirty million, six hundred eighty thousand, nineteen".