20361387 has 8 divisors (see below), whose sum is σ = 27726336. Its totient is φ = 13285352.

The previous prime is 20361377. The next prime is 20361401. The reversal of 20361387 is 78316302.

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 20361387 - 2⁶ = 20361323 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20361337) 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 7 ways as a sum of consecutive naturals, for example, 72063 + ... + 72344.

It is an arithmetic number, because the mean of its divisors is an integer number (3465792).

Almost surely, 2^20361387 is an apocalyptic number.

20361387 is a deficient number, since it is larger than the sum of its proper divisors (7364949).

20361387 is a wasteful number, since it uses less digits than its factorization.

20361387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144457.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 20361387 is about 4512.3593606893. The cubic root of 20361387 is about 273.0669373894.

Adding to 20361387 its reverse (78316302), we get a palindrome (98677689).

The spelling of 20361387 in words is "twenty million, three hundred sixty-one thousand, three hundred eighty-seven".