20960405 has 16 divisors (see below), whose sum is σ = 26961984. Its totient is φ = 15586560.

The previous prime is 20960377. The next prime is 20960413. The reversal of 20960405 is 50406902.

It is not a de Polignac number, because 20960405 - 2¹⁰ = 20959381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5570 + ... + 8540.

It is an arithmetic number, because the mean of its divisors is an integer number (1685124).

Almost surely, 2^20960405 is an apocalyptic number.

It is an amenable number.

20960405 is a deficient number, since it is larger than the sum of its proper divisors (6001579).

20960405 is a wasteful number, since it uses less digits than its factorization.

20960405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3076.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 20960405 is about 4578.2534879580. The cubic root of 20960405 is about 275.7189123508.

The spelling of 20960405 in words is "twenty million, nine hundred sixty thousand, four hundred five".