21416849936 has 10 divisors (see below), whose sum is σ = 41495146782. Its totient is φ = 10708424960.

The previous prime is 21416849933. The next prime is 21416849941. The reversal of 21416849936 is 63994861412.

It can be written as a sum of positive squares in only one way, i.e., 18811768336 + 2605081600 = 137156^2 + 51040^2 .

It is a super-2 number, since 2×21416849936² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21416849933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 669276545 + ... + 669276576.

Almost surely, 2^21416849936 is an apocalyptic number.

It is an amenable number.

21416849936 is a deficient number, since it is larger than the sum of its proper divisors (20078296846).

21416849936 is a wasteful number, since it uses less digits than its factorization.

21416849936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1338553129 (or 1338553123 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 53.

The spelling of 21416849936 in words is "twenty-one billion, four hundred sixteen million, eight hundred forty-nine thousand, nine hundred thirty-six".