20477265 has 32 divisors (see below), whose sum is σ = 35012736. Its totient is φ = 10183680.

The previous prime is 20477263. The next prime is 20477287. The reversal of 20477265 is 56277402.

It is not a de Polignac number, because 20477265 - 2¹ = 20477263 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20477263) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33099 + ... + 33711.

It is an arithmetic number, because the mean of its divisors is an integer number (1094148).

Almost surely, 2^20477265 is an apocalyptic number.

It is an amenable number.

20477265 is a deficient number, since it is larger than the sum of its proper divisors (14535471).

20477265 is a wasteful number, since it uses less digits than its factorization.

20477265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 769.

The product of its (nonzero) digits is 23520, while the sum is 33.

The square root of 20477265 is about 4525.1812118411. The cubic root of 20477265 is about 273.5839718005.

The spelling of 20477265 in words is "twenty million, four hundred seventy-seven thousand, two hundred sixty-five".