20718052 has 6 divisors (see below), whose sum is σ = 36256598. Its totient is φ = 10359024.

The previous prime is 20718031. The next prime is 20718073. The reversal of 20718052 is 25081702.

It is an interprime number because it is at equal distance from previous prime (20718031) and next prime (20718073).

It can be written as a sum of positive squares in only one way, i.e., 11329956 + 9388096 = 3366^2 + 3064^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 2589753 + ... + 2589760.

Almost surely, 2^20718052 is an apocalyptic number.

It is an amenable number.

20718052 is a deficient number, since it is larger than the sum of its proper divisors (15538546).

20718052 is a wasteful number, since it uses less digits than its factorization.

20718052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5179517 (or 5179515 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 20718052 is about 4551.7086901514. The cubic root of 20718052 is about 274.6521309376.

Adding to 20718052 its reverse (25081702), we get a palindrome (45799754).

The spelling of 20718052 in words is "twenty million, seven hundred eighteen thousand, fifty-two".