20470741 has 4 divisors (see below), whose sum is σ = 20652012. Its totient is φ = 20289472.

The previous prime is 20470739. The next prime is 20470753. The reversal of 20470741 is 14707402.

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 4100625 + 16370116 = 2025^2 + 4046^2 .

It is a cyclic number.

It is not a de Polignac number, because 20470741 - 2¹ = 20470739 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 (20470721) 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, 90466 + ... + 90691.

It is an arithmetic number, because the mean of its divisors is an integer number (5163003).

Almost surely, 2^20470741 is an apocalyptic number.

It is an amenable number.

20470741 is a deficient number, since it is larger than the sum of its proper divisors (181271).

20470741 is a wasteful number, since it uses less digits than its factorization.

20470741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181270.

The product of its (nonzero) digits is 1568, while the sum is 25.

The square root of 20470741 is about 4524.4602993064. The cubic root of 20470741 is about 273.5549143488.

The spelling of 20470741 in words is "twenty million, four hundred seventy thousand, seven hundred forty-one".