20045577 has 8 divisors (see below), whose sum is σ = 26892064. Its totient is φ = 13281408.

The previous prime is 20045573. The next prime is 20045591. The reversal of 20045577 is 77554002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20045577 - 2² = 20045573 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20045573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20008 + ... + 20985.

It is an arithmetic number, because the mean of its divisors is an integer number (3361508).

Almost surely, 2^20045577 is an apocalyptic number.

It is an amenable number.

20045577 is a deficient number, since it is larger than the sum of its proper divisors (6846487).

20045577 is a wasteful number, since it uses less digits than its factorization.

20045577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41159.

The product of its (nonzero) digits is 9800, while the sum is 30.

The square root of 20045577 is about 4477.2287187500. The cubic root of 20045577 is about 271.6477969170.

Adding to 20045577 its reverse (77554002), we get a palindrome (97599579).

The spelling of 20045577 in words is "twenty million, forty-five thousand, five hundred seventy-seven".