20290077 has 12 divisors (see below), whose sum is σ = 29489824. Its totient is φ = 13442760.

The previous prime is 20290051. The next prime is 20290091. The reversal of 20290077 is 77009202.

It is not a de Polignac number, because 20290077 - 2¹⁰ = 20289053 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20290077.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20290007) 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 11 ways as a sum of consecutive naturals, for example, 5449 + ... + 8382.

Almost surely, 2^20290077 is an apocalyptic number.

It is an amenable number.

20290077 is a deficient number, since it is larger than the sum of its proper divisors (9199747).

20290077 is a wasteful number, since it uses less digits than its factorization.

20290077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14000 (or 13997 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 27.

The square root of 20290077 is about 4504.4507989321. The cubic root of 20290077 is about 272.7477846088.

Adding to 20290077 its reverse (77009202), we get a palindrome (97299279).

The spelling of 20290077 in words is "twenty million, two hundred ninety thousand, seventy-seven".