20677430 has 16 divisors (see below), whose sum is σ = 37387440. Its totient is φ = 8233632.

The previous prime is 20677421. The next prime is 20677463. The reversal of 20677430 is 3477602.

It is a super-2 number, since 2×20677430² = 855112222809800, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20677393 and 20677402.

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 7 ways as a sum of consecutive naturals, for example, 2285 + ... + 6824.

It is an arithmetic number, because the mean of its divisors is an integer number (2336715).

Almost surely, 2^20677430 is an apocalyptic number.

20677430 is a deficient number, since it is larger than the sum of its proper divisors (16710010).

20677430 is a wasteful number, since it uses less digits than its factorization.

20677430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9343.

The product of its (nonzero) digits is 7056, while the sum is 29.

The square root of 20677430 is about 4547.2442204043. The cubic root of 20677430 is about 274.4725095036.

The spelling of 20677430 in words is "twenty million, six hundred seventy-seven thousand, four hundred thirty".