20090877 has 4 divisors (see below), whose sum is σ = 26787840. Its totient is φ = 13393916.

The previous prime is 20090867. The next prime is 20090879. The reversal of 20090877 is 77809002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20090877 - 2⁶ = 20090813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20090879) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3348477 + ... + 3348482.

It is an arithmetic number, because the mean of its divisors is an integer number (6696960).

Almost surely, 2^20090877 is an apocalyptic number.

It is an amenable number.

20090877 is a deficient number, since it is larger than the sum of its proper divisors (6696963).

20090877 is an equidigital number, since it uses as much as digits as its factorization.

20090877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6696962.

The product of its (nonzero) digits is 7056, while the sum is 33.

The square root of 20090877 is about 4482.2847968419. The cubic root of 20090877 is about 271.8522707382.

Adding to 20090877 its reverse (77809002), we get a palindrome (97899879).

The spelling of 20090877 in words is "twenty million, ninety thousand, eight hundred seventy-seven".