20315486 has 32 divisors (see below), whose sum is σ = 33445440. Its totient is φ = 9225216.

The previous prime is 20315473. The next prime is 20315489. The reversal of 20315486 is 68451302.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20315489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129320 + ... + 129476.

It is an arithmetic number, because the mean of its divisors is an integer number (1045170).

Almost surely, 2^20315486 is an apocalyptic number.

20315486 is a deficient number, since it is larger than the sum of its proper divisors (13129954).

20315486 is a wasteful number, since it uses less digits than its factorization.

20315486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 20315486 is about 4507.2703491138. The cubic root of 20315486 is about 272.8615899529.

Adding to 20315486 its reverse (68451302), we get a palindrome (88766788).

The spelling of 20315486 in words is "twenty million, three hundred fifteen thousand, four hundred eighty-six".