20959394 has 16 divisors (see below), whose sum is σ = 34534080. Its totient is φ = 9496080.

The previous prime is 20959387. The next prime is 20959397. The reversal of 20959394 is 49395902.

It is not an unprimeable number, because it can be changed into a prime (20959397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11117 + ... + 12864.

It is an arithmetic number, because the mean of its divisors is an integer number (2158380).

Almost surely, 2^20959394 is an apocalyptic number.

20959394 is a deficient number, since it is larger than the sum of its proper divisors (13574686).

20959394 is a wasteful number, since it uses less digits than its factorization.

20959394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24025.

The product of its (nonzero) digits is 87480, while the sum is 41.

The square root of 20959394 is about 4578.1430733432. The cubic root of 20959394 is about 275.7144792892.

The spelling of 20959394 in words is "twenty million, nine hundred fifty-nine thousand, three hundred ninety-four".