20677730 has 32 divisors (see below), whose sum is σ = 38335680. Its totient is φ = 8027200.

The previous prime is 20677717. The next prime is 20677733. The reversal of 20677730 is 3777602.

It is not an unprimeable number, because it can be changed into a prime (20677733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59417 + ... + 59763.

It is an arithmetic number, because the mean of its divisors is an integer number (1197990).

Almost surely, 2^20677730 is an apocalyptic number.

20677730 is a deficient number, since it is larger than the sum of its proper divisors (17657950).

20677730 is a wasteful number, since it uses less digits than its factorization.

20677730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514.

The product of its (nonzero) digits is 12348, while the sum is 32.

The square root of 20677730 is about 4547.2772072967. The cubic root of 20677730 is about 274.4738368987.

The spelling of 20677730 in words is "twenty million, six hundred seventy-seven thousand, seven hundred thirty".