21814968820969 has 16 divisors (see below), whose sum is σ = 23113588861440. Its totient is φ = 20518060734720.

The previous prime is 21814968820937. The next prime is 21814968820973. The reversal of 21814968820969 is 96902886941812.

It is a cyclic number.

It is not a de Polignac number, because 21814968820969 - 2⁵ = 21814968820937 is a prime.

It is a super-2 number, since 2×21814968820969² (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 (21814968820979) 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, 371156554 + ... + 371215324.

It is an arithmetic number, because the mean of its divisors is an integer number (1444599303840).

Almost surely, 2^{21814968820969} is an apocalyptic number.

It is an amenable number.

21814968820969 is a deficient number, since it is larger than the sum of its proper divisors (1298620040471).

21814968820969 is a wasteful number, since it uses less digits than its factorization.

21814968820969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72960.

The product of its (nonzero) digits is 214990848, while the sum is 73.

The spelling of 21814968820969 in words is "twenty-one trillion, eight hundred fourteen billion, nine hundred sixty-eight million, eight hundred twenty thousand, nine hundred sixty-nine".