21436022361 has 12 divisors (see below), whose sum is σ = 30949050768. Its totient is φ = 13191398064.

The previous prime is 21436022359. The next prime is 21436022389. The reversal of 21436022361 is 16322063412.

It is not a de Polignac number, because 21436022361 - 2¹ = 21436022359 is a prime.

It is a super-2 number, since 2×21436022361² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21436022341) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21139555 + ... + 21140568.

It is an arithmetic number, because the mean of its divisors is an integer number (2579087564).

Almost surely, 2^21436022361 is an apocalyptic number.

It is an amenable number.

21436022361 is a deficient number, since it is larger than the sum of its proper divisors (9513028407).

21436022361 is a wasteful number, since it uses less digits than its factorization.

21436022361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42280152 (or 42280139 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

Adding to 21436022361 its reverse (16322063412), we get a palindrome (37758085773).

The spelling of 21436022361 in words is "twenty-one billion, four hundred thirty-six million, twenty-two thousand, three hundred sixty-one".