21036577223 has 8 divisors (see below), whose sum is σ = 22316621328. Its totient is φ = 19761266304.

The previous prime is 21036577213. The next prime is 21036577253. The reversal of 21036577223 is 32277563012.

It is a happy number.

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

It is not a de Polignac number, because 21036577223 - 2¹² = 21036573127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21036577213) 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, 1174136 + ... + 1191917.

It is an arithmetic number, because the mean of its divisors is an integer number (2789577666).

Almost surely, 2^21036577223 is an apocalyptic number.

21036577223 is a deficient number, since it is larger than the sum of its proper divisors (1280044105).

21036577223 is a wasteful number, since it uses less digits than its factorization.

21036577223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2366593.

The product of its (nonzero) digits is 105840, while the sum is 38.

The spelling of 21036577223 in words is "twenty-one billion, thirty-six million, five hundred seventy-seven thousand, two hundred twenty-three".