21214036536409 has 8 divisors (see below), whose sum is σ = 22070788333568. Its totient is φ = 20368061491680.

The previous prime is 21214036536403. The next prime is 21214036536449. The reversal of 21214036536409 is 90463563041212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21214036536409 - 2³ = 21214036536401 is a prime.

It is a super-2 number, since 2×21214036536409² (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 (21214036536401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2694184092 + ... + 2694191965.

It is an arithmetic number, because the mean of its divisors is an integer number (2758848541696).

Almost surely, 2^{21214036536409} is an apocalyptic number.

It is an amenable number.

21214036536409 is a deficient number, since it is larger than the sum of its proper divisors (856751797159).

21214036536409 is a wasteful number, since it uses less digits than its factorization.

21214036536409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5388376215.

The product of its (nonzero) digits is 933120, while the sum is 46.

The spelling of 21214036536409 in words is "twenty-one trillion, two hundred fourteen billion, thirty-six million, five hundred thirty-six thousand, four hundred nine".