20514545 has 4 divisors (see below), whose sum is σ = 24617460. Its totient is φ = 16411632.

The previous prime is 20514541. The next prime is 20514553. The reversal of 20514545 is 54541502.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7612081 + 12902464 = 2759^2 + 3592^2 .

It is a cyclic number.

It is not a de Polignac number, because 20514545 - 2² = 20514541 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20514541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2051450 + ... + 2051459.

It is an arithmetic number, because the mean of its divisors is an integer number (6154365).

Almost surely, 2^20514545 is an apocalyptic number.

It is an amenable number.

20514545 is a deficient number, since it is larger than the sum of its proper divisors (4102915).

20514545 is an equidigital number, since it uses as much as digits as its factorization.

20514545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4102914.

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 20514545 is about 4529.2985108072. The cubic root of 20514545 is about 273.7498960961.

The spelling of 20514545 in words is "twenty million, five hundred fourteen thousand, five hundred forty-five".