21678432212019 has 16 divisors (see below), whose sum is σ = 32066710208640. Its totient is φ = 12915758276160.

The previous prime is 21678432211967. The next prime is 21678432212033. The reversal of 21678432212019 is 91021223487612.

It is not a de Polignac number, because 21678432212019 - 2¹⁵ = 21678432179251 is a prime.

It is a super-2 number, since 2×21678432212019² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21678432212419) 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, 5567135242 + ... + 5567139135.

It is an arithmetic number, because the mean of its divisors is an integer number (2004169388040).

Almost surely, 2^{21678432212019} is an apocalyptic number.

21678432212019 is a deficient number, since it is larger than the sum of its proper divisors (10388277996621).

21678432212019 is a wasteful number, since it uses less digits than its factorization.

21678432212019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11134274450.

The product of its (nonzero) digits is 580608, while the sum is 48.

The spelling of 21678432212019 in words is "twenty-one trillion, six hundred seventy-eight billion, four hundred thirty-two million, two hundred twelve thousand, nineteen".