20771413 has 4 divisors (see below), whose sum is σ = 22369228. Its totient is φ = 19173600.

The previous prime is 20771411. The next prime is 20771419. The reversal of 20771413 is 31417702.

It is a happy number.

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 12802084 + 7969329 = 3578^2 + 2823^2 .

It is a cyclic number.

It is not a de Polignac number, because 20771413 - 2¹ = 20771411 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 (20771411) 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, 798888 + ... + 798913.

It is an arithmetic number, because the mean of its divisors is an integer number (5592307).

Almost surely, 2^20771413 is an apocalyptic number.

It is an amenable number.

20771413 is a deficient number, since it is larger than the sum of its proper divisors (1597815).

20771413 is a wasteful number, since it uses less digits than its factorization.

20771413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1597814.

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 20771413 is about 4557.5665656137. The cubic root of 20771413 is about 274.8877249663.

The spelling of 20771413 in words is "twenty million, seven hundred seventy-one thousand, four hundred thirteen".