21414720420461 has 16 divisors (see below), whose sum is σ = 21867249741120. Its totient is φ = 20967457098240.

The previous prime is 21414720420407. The next prime is 21414720420523. The reversal of 21414720420461 is 16402402741412.

It is a cyclic number.

It is not a de Polignac number, because 21414720420461 - 2¹⁸ = 21414720158317 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 (21414720420161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6274091 + ... + 9066071.

It is an arithmetic number, because the mean of its divisors is an integer number (1366703108820).

Almost surely, 2^{21414720420461} is an apocalyptic number.

It is an amenable number.

21414720420461 is a deficient number, since it is larger than the sum of its proper divisors (452529320659).

21414720420461 is a wasteful number, since it uses less digits than its factorization.

21414720420461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2792924.

The product of its (nonzero) digits is 86016, while the sum is 38.

The spelling of 21414720420461 in words is "twenty-one trillion, four hundred fourteen billion, seven hundred twenty million, four hundred twenty thousand, four hundred sixty-one".