20410665451421 has 16 divisors (see below), whose sum is σ = 24133517283840. Its totient is φ = 16889708304000.

The previous prime is 20410665451399. The next prime is 20410665451453. The reversal of 20410665451421 is 12415456601402.

It is not a de Polignac number, because 20410665451421 - 2³⁴ = 20393485582237 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 (20410665451471) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3753080 + ... + 7409921.

It is an arithmetic number, because the mean of its divisors is an integer number (1508344830240).

Almost surely, 2^{20410665451421} is an apocalyptic number.

It is an amenable number.

20410665451421 is a deficient number, since it is larger than the sum of its proper divisors (3722851832419).

20410665451421 is a wasteful number, since it uses less digits than its factorization.

20410665451421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11172044.

The product of its (nonzero) digits is 230400, while the sum is 41.

The spelling of 20410665451421 in words is "twenty trillion, four hundred ten billion, six hundred sixty-five million, four hundred fifty-one thousand, four hundred twenty-one".