20673955 has 16 divisors (see below), whose sum is σ = 27177120. Its totient is φ = 15027712.

The previous prime is 20673943. The next prime is 20673959. The reversal of 20673955 is 55937602.

It is a cyclic number.

It is not a de Polignac number, because 20673955 - 2¹¹ = 20671907 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20673959) 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, 1729 + ... + 6658.

It is an arithmetic number, because the mean of its divisors is an integer number (1698570).

Almost surely, 2^20673955 is an apocalyptic number.

20673955 is a deficient number, since it is larger than the sum of its proper divisors (6503165).

20673955 is a wasteful number, since it uses less digits than its factorization.

20673955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8438.

The product of its (nonzero) digits is 56700, while the sum is 37.

The square root of 20673955 is about 4546.8621047927. The cubic root of 20673955 is about 274.4571329085.

The spelling of 20673955 in words is "twenty million, six hundred seventy-three thousand, nine hundred fifty-five".