20507741 has 4 divisors (see below), whose sum is σ = 20520000. Its totient is φ = 20495484.

The previous prime is 20507737. The next prime is 20507761. The reversal of 20507741 is 14770502.

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.

It is a cyclic number.

It is not a de Polignac number, because 20507741 - 2² = 20507737 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 20507741.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20507701) 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, 3131 + ... + 7128.

It is an arithmetic number, because the mean of its divisors is an integer number (5130000).

Almost surely, 2^20507741 is an apocalyptic number.

It is an amenable number.

20507741 is a deficient number, since it is larger than the sum of its proper divisors (12259).

20507741 is a wasteful number, since it uses less digits than its factorization.

20507741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12258.

The product of its (nonzero) digits is 1960, while the sum is 26.

The square root of 20507741 is about 4528.5473388273. The cubic root of 20507741 is about 273.7196281366.

The spelling of 20507741 in words is "twenty million, five hundred seven thousand, seven hundred forty-one".