20959413 has 16 divisors (see below), whose sum is σ = 29836800. Its totient is φ = 13048560.

The previous prime is 20959403. The next prime is 20959429. The reversal of 20959413 is 31495902.

It is not a de Polignac number, because 20959413 - 2⁴ = 20959397 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20959403) 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, 1458 + ... + 6636.

It is an arithmetic number, because the mean of its divisors is an integer number (1864800).

Almost surely, 2^20959413 is an apocalyptic number.

It is an amenable number.

20959413 is a deficient number, since it is larger than the sum of its proper divisors (8877387).

20959413 is a wasteful number, since it uses less digits than its factorization.

20959413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5272.

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 20959413 is about 4578.1451484198. The cubic root of 20959413 is about 275.7145626022.

The spelling of 20959413 in words is "twenty million, nine hundred fifty-nine thousand, four hundred thirteen".