20514709 has 4 divisors (see below), whose sum is σ = 20650720. Its totient is φ = 20378700.

The previous prime is 20514707. The next prime is 20514743. The reversal of 20514709 is 90741502.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90741502 = 2 ⋅45370751.

It is a cyclic number.

It is not a de Polignac number, because 20514709 - 2¹ = 20514707 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20514707) 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, 67779 + ... + 68080.

It is an arithmetic number, because the mean of its divisors is an integer number (5162680).

Almost surely, 2^20514709 is an apocalyptic number.

It is an amenable number.

20514709 is a deficient number, since it is larger than the sum of its proper divisors (136011).

20514709 is a wasteful number, since it uses less digits than its factorization.

20514709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136010.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 20514709 is about 4529.3166151198. The cubic root of 20514709 is about 273.7506255763.

The spelling of 20514709 in words is "twenty million, five hundred fourteen thousand, seven hundred nine".