20136477 has 8 divisors (see below), whose sum is σ = 28016064. Its totient is φ = 12840608.

The previous prime is 20136463. The next prime is 20136481. The reversal of 20136477 is 77463102.

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

It is a cyclic number.

It is not a de Polignac number, because 20136477 - 2¹⁸ = 19874333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20136407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145848 + ... + 145985.

It is an arithmetic number, because the mean of its divisors is an integer number (3502008).

Almost surely, 2^20136477 is an apocalyptic number.

It is an amenable number.

20136477 is a deficient number, since it is larger than the sum of its proper divisors (7879587).

20136477 is a wasteful number, since it uses less digits than its factorization.

20136477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291859.

The product of its (nonzero) digits is 7056, while the sum is 30.

The square root of 20136477 is about 4487.3686053187. The cubic root of 20136477 is about 272.0577885073.

Adding to 20136477 its reverse (77463102), we get a palindrome (97599579).

The spelling of 20136477 in words is "twenty million, one hundred thirty-six thousand, four hundred seventy-seven".