20225977 has 2 divisors, whose sum is σ = 20225978. Its totient is φ = 20225976.

The previous prime is 20225941. The next prime is 20225987. The reversal of 20225977 is 77952202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19971961 + 254016 = 4469^2 + 504^2 .

It is a cyclic number.

It is not a de Polignac number, because 20225977 - 2¹⁵ = 20193209 is a prime.

It is not a weakly prime, because it can be changed into another prime (20225917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10112988 + 10112989.

It is an arithmetic number, because the mean of its divisors is an integer number (10112989).

Almost surely, 2^20225977 is an apocalyptic number.

It is an amenable number.

20225977 is a deficient number, since it is larger than the sum of its proper divisors (1).

20225977 is an equidigital number, since it uses as much as digits as its factorization.

20225977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 20225977 is about 4497.3299856693. The cubic root of 20225977 is about 272.4602618596.

The spelling of 20225977 in words is "twenty million, two hundred twenty-five thousand, nine hundred seventy-seven".