20673777 has 16 divisors (see below), whose sum is σ = 28200960. Its totient is φ = 13467600.

The previous prime is 20673769. The next prime is 20673797. The reversal of 20673777 is 77737602.

It is not a de Polignac number, because 20673777 - 2³ = 20673769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20673797) 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, 47752 + ... + 48182.

It is an arithmetic number, because the mean of its divisors is an integer number (1762560).

Almost surely, 2^20673777 is an apocalyptic number.

It is an amenable number.

20673777 is a deficient number, since it is larger than the sum of its proper divisors (7527183).

20673777 is a wasteful number, since it uses less digits than its factorization.

20673777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 764.

The product of its (nonzero) digits is 86436, while the sum is 39.

The square root of 20673777 is about 4546.8425308119. The cubic root of 20673777 is about 274.4563452265.

The spelling of 20673777 in words is "twenty million, six hundred seventy-three thousand, seven hundred seventy-seven".