20321253441 has 6 divisors (see below), whose sum is σ = 29352921650. Its totient is φ = 13547502288.

The previous prime is 20321253437. The next prime is 20321253451. The reversal of 20321253441 is 14435212302.

20321253441 is a `hidden beast` number, since 2 + 0 + 3 + 212 + 5 + 3 + 441 = 666.

It can be written as a sum of positive squares in only one way, i.e., 18606051216 + 1715202225 = 136404^2 + 41415^2 .

It is not a de Polignac number, because 20321253441 - 2² = 20321253437 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20321253451) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1128958516 + ... + 1128958533.

Almost surely, 2^20321253441 is an apocalyptic number.

It is an amenable number.

20321253441 is a deficient number, since it is larger than the sum of its proper divisors (9031668209).

20321253441 is a wasteful number, since it uses less digits than its factorization.

20321253441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2257917055 (or 2257917052 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 20321253441 its reverse (14435212302), we get a palindrome (34756465743).

The spelling of 20321253441 in words is "twenty billion, three hundred twenty-one million, two hundred fifty-three thousand, four hundred forty-one".