20773477 has 4 divisors (see below), whose sum is σ = 20859916. Its totient is φ = 20687040.

The previous prime is 20773469. The next prime is 20773549. The reversal of 20773477 is 77437702.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 77437702 = 2 ⋅38718851.

It can be written as a sum of positive squares in 2 ways, for example, as 5788836 + 14984641 = 2406^2 + 3871^2 .

It is a cyclic number.

It is not a de Polignac number, because 20773477 - 2³ = 20773469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20773427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42858 + ... + 43339.

It is an arithmetic number, because the mean of its divisors is an integer number (5214979).

Almost surely, 2^20773477 is an apocalyptic number.

It is an amenable number.

20773477 is a deficient number, since it is larger than the sum of its proper divisors (86439).

20773477 is an equidigital number, since it uses as much as digits as its factorization.

20773477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86438.

The product of its (nonzero) digits is 57624, while the sum is 37.

The square root of 20773477 is about 4557.7929966158. The cubic root of 20773477 is about 274.8968296185.

The spelling of 20773477 in words is "twenty million, seven hundred seventy-three thousand, four hundred seventy-seven".