21355473044269 has 16 divisors (see below), whose sum is σ = 26286286779648. Its totient is φ = 16894948810752.

The previous prime is 21355473044267. The next prime is 21355473044287. The reversal of 21355473044269 is 96244037455312.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21355473044269 - 2¹ = 21355473044267 is a prime.

It is a super-2 number, since 2×21355473044269² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21355473044261) 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, 10814932 + ... + 12636205.

It is an arithmetic number, because the mean of its divisors is an integer number (1642892923728).

Almost surely, 2^{21355473044269} is an apocalyptic number.

It is an amenable number.

21355473044269 is a deficient number, since it is larger than the sum of its proper divisors (4930813735379).

21355473044269 is a wasteful number, since it uses less digits than its factorization.

21355473044269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23461164.

The product of its (nonzero) digits is 21772800, while the sum is 55.

The spelling of 21355473044269 in words is "twenty-one trillion, three hundred fifty-five billion, four hundred seventy-three million, forty-four thousand, two hundred sixty-nine".