21450361461 has 8 divisors (see below), whose sum is σ = 28633097184. Its totient is φ = 14283933360.

The previous prime is 21450361451. The next prime is 21450361469. The reversal of 21450361461 is 16416305412.

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

It is not a de Polignac number, because 21450361461 - 2⁹ = 21450360949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21450361469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4073835 + ... + 4079096.

It is an arithmetic number, because the mean of its divisors is an integer number (3579137148).

Almost surely, 2^21450361461 is an apocalyptic number.

It is an amenable number.

21450361461 is a deficient number, since it is larger than the sum of its proper divisors (7182735723).

21450361461 is an equidigital number, since it uses as much as digits as its factorization.

21450361461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8153811.

The product of its (nonzero) digits is 17280, while the sum is 33.

Adding to 21450361461 its reverse (16416305412), we get a palindrome (37866666873).

The spelling of 21450361461 in words is "twenty-one billion, four hundred fifty million, three hundred sixty-one thousand, four hundred sixty-one".