20306955 has 16 divisors (see below), whose sum is σ = 32659200. Its totient is φ = 10774368.

The previous prime is 20306941. The next prime is 20306971. The reversal of 20306955 is 55960302.

It is not a de Polignac number, because 20306955 - 2⁷ = 20306827 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 417 + ... + 6386.

It is an arithmetic number, because the mean of its divisors is an integer number (2041200).

Almost surely, 2^20306955 is an apocalyptic number.

20306955 is a deficient number, since it is larger than the sum of its proper divisors (12352245).

20306955 is a wasteful number, since it uses less digits than its factorization.

20306955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7010.

The product of its (nonzero) digits is 8100, while the sum is 30.

The square root of 20306955 is about 4506.3238898242. The cubic root of 20306955 is about 272.8233907169.

The spelling of 20306955 in words is "twenty million, three hundred six thousand, nine hundred fifty-five".