20677406 has 32 divisors (see below), whose sum is σ = 34590240. Its totient is φ = 9225216.

The previous prime is 20677387. The next prime is 20677411. The reversal of 20677406 is 60477602.

It is a happy number.

It is a Curzon number.

It is a congruent number.

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, 65906 + ... + 66218.

It is an arithmetic number, because the mean of its divisors is an integer number (1080945).

Almost surely, 2^20677406 is an apocalyptic number.

20677406 is a deficient number, since it is larger than the sum of its proper divisors (13912834).

20677406 is a wasteful number, since it uses less digits than its factorization.

20677406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428.

The product of its (nonzero) digits is 14112, while the sum is 32.

The square root of 20677406 is about 4547.2415814425. The cubic root of 20677406 is about 274.4724033115.

The spelling of 20677406 in words is "twenty million, six hundred seventy-seven thousand, four hundred six".