20295505 has 8 divisors (see below), whose sum is σ = 25194600. Its totient is φ = 15676416.

The previous prime is 20295491. The next prime is 20295523. The reversal of 20295505 is 50559202.

It can be written as a sum of positive squares in 4 ways, for example, as 18496 + 20277009 = 136^2 + 4503^2 .

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 20295505 - 2¹³ = 20287313 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69840 + ... + 70129.

It is an arithmetic number, because the mean of its divisors is an integer number (3149325).

Almost surely, 2^20295505 is an apocalyptic number.

It is an amenable number.

20295505 is a deficient number, since it is larger than the sum of its proper divisors (4899095).

20295505 is a wasteful number, since it uses less digits than its factorization.

20295505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140003.

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 20295505 is about 4505.0532738249. The cubic root of 20295505 is about 272.7721042631.

The spelling of 20295505 in words is "twenty million, two hundred ninety-five thousand, five hundred five".