21070900019 has 8 divisors (see below), whose sum is σ = 24026546880. Its totient is φ = 18305940096.

The previous prime is 21070900009. The next prime is 21070900021. The reversal of 21070900019 is 91000907012.

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 21070900019 - 2²⁰ = 21069851443 is a prime.

It is a super-2 number, since 2×21070900019² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21070899964 and 21070900000.

It is not an unprimeable number, because it can be changed into a prime (21070900009) 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, 47671499 + ... + 47671940.

It is an arithmetic number, because the mean of its divisors is an integer number (3003318360).

Almost surely, 2^21070900019 is an apocalyptic number.

21070900019 is a deficient number, since it is larger than the sum of its proper divisors (2955646861).

21070900019 is a wasteful number, since it uses less digits than its factorization.

21070900019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95343469.

The product of its (nonzero) digits is 1134, while the sum is 29.

The spelling of 21070900019 in words is "twenty-one billion, seventy million, nine hundred thousand, nineteen".