20535077 has 4 divisors (see below), whose sum is σ = 20547276. Its totient is φ = 20522880.

The previous prime is 20535061. The next prime is 20535079. The reversal of 20535077 is 77053502.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15007876 + 5527201 = 3874^2 + 2351^2 .

It is a cyclic number.

It is not a de Polignac number, because 20535077 - 2⁴ = 20535061 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 (20535079) 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 3 ways as a sum of consecutive naturals, for example, 3074 + ... + 7107.

It is an arithmetic number, because the mean of its divisors is an integer number (5136819).

Almost surely, 2^20535077 is an apocalyptic number.

It is an amenable number.

20535077 is a deficient number, since it is larger than the sum of its proper divisors (12199).

20535077 is a wasteful number, since it uses less digits than its factorization.

20535077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12198.

The product of its (nonzero) digits is 7350, while the sum is 29.

The square root of 20535077 is about 4531.5645201189. The cubic root of 20535077 is about 273.8411932509.

Adding to 20535077 its reverse (77053502), we get a palindrome (97588579).

The spelling of 20535077 in words is "twenty million, five hundred thirty-five thousand, seventy-seven".