20755465 has 8 divisors (see below), whose sum is σ = 24955848. Its totient is φ = 16571520.

The previous prime is 20755463. The next prime is 20755507. The reversal of 20755465 is 56455702.

It can be written as a sum of positive squares in 4 ways, for example, as 2274064 + 18481401 = 1508^2 + 4299^2 .

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

It is not a de Polignac number, because 20755465 - 2¹ = 20755463 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20755465.

It is not an unprimeable number, because it can be changed into a prime (20755463) 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, 1132 + ... + 6541.

It is an arithmetic number, because the mean of its divisors is an integer number (3119481).

Almost surely, 2^20755465 is an apocalyptic number.

It is an amenable number.

20755465 is a deficient number, since it is larger than the sum of its proper divisors (4200383).

20755465 is an equidigital number, since it uses as much as digits as its factorization.

20755465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8219.

The product of its (nonzero) digits is 42000, while the sum is 34.

The square root of 20755465 is about 4555.8166117613. The cubic root of 20755465 is about 274.8173553051.

The spelling of 20755465 in words is "twenty million, seven hundred fifty-five thousand, four hundred sixty-five".