21228905430019 has 32 divisors (see below), whose sum is σ = 24773905728000. Its totient is φ = 17814647445504.

The previous prime is 21228905430017. The next prime is 21228905430023. The reversal of 21228905430019 is 91003450982212.

It is not a de Polignac number, because 21228905430019 - 2¹ = 21228905430017 is a prime.

It is a super-2 number, since 2×21228905430019² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21228905430013) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 105772707 + ... + 105973219.

It is an arithmetic number, because the mean of its divisors is an integer number (774184554000).

Almost surely, 2^{21228905430019} is an apocalyptic number.

21228905430019 is a deficient number, since it is larger than the sum of its proper divisors (3545000297981).

21228905430019 is a wasteful number, since it uses less digits than its factorization.

21228905430019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201627.

The product of its (nonzero) digits is 311040, while the sum is 46.

The spelling of 21228905430019 in words is "twenty-one trillion, two hundred twenty-eight billion, nine hundred five million, four hundred thirty thousand, nineteen".