21227366839819 has 16 divisors (see below), whose sum is σ = 24798860951040. Its totient is φ = 17793821744640.

The previous prime is 21227366839813. The next prime is 21227366839831. The reversal of 21227366839819 is 91893866372212.

It is a cyclic number.

It is not a de Polignac number, because 21227366839819 - 2⁹ = 21227366839307 is a prime.

It is a super-2 number, since 2×21227366839819² (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 (21227366839813) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133075687 + ... + 133235104.

It is an arithmetic number, because the mean of its divisors is an integer number (1549928809440).

Almost surely, 2^{21227366839819} is an apocalyptic number.

21227366839819 is a deficient number, since it is larger than the sum of its proper divisors (3571494111221).

21227366839819 is a wasteful number, since it uses less digits than its factorization.

21227366839819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266311050.

The product of its digits is 94058496, while the sum is 67.

The spelling of 21227366839819 in words is "twenty-one trillion, two hundred twenty-seven billion, three hundred sixty-six million, eight hundred thirty-nine thousand, eight hundred nineteen".