20638077 has 8 divisors (see below), whose sum is σ = 27928416. Its totient is φ = 13553232.

The previous prime is 20638043. The next prime is 20638081. The reversal of 20638077 is 77083602.

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

It is not a de Polignac number, because 20638077 - 2¹¹ = 20636029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20638087) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51138 + ... + 51539.

It is an arithmetic number, because the mean of its divisors is an integer number (3491052).

Almost surely, 2^20638077 is an apocalyptic number.

It is an amenable number.

20638077 is a deficient number, since it is larger than the sum of its proper divisors (7290339).

20638077 is a wasteful number, since it uses less digits than its factorization.

20638077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102747.

The product of its (nonzero) digits is 14112, while the sum is 33.

The square root of 20638077 is about 4542.9150333239. The cubic root of 20638077 is about 274.2982748232.

It can be divided in two parts, 206 and 38077, that added together give a palindrome (38283).

The spelling of 20638077 in words is "twenty million, six hundred thirty-eight thousand, seventy-seven".