20277049 has 4 divisors (see below), whose sum is σ = 21836836. Its totient is φ = 18717264.

The previous prime is 20277041. The next prime is 20277077. The reversal of 20277049 is 94077202.

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 4020025 + 16257024 = 2005^2 + 4032^2 .

It is a cyclic number.

It is not a de Polignac number, because 20277049 - 2³ = 20277041 is a prime.

It is a super-2 number, since 2×20277049² = 822317432296802, which contains 22 as substring.

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 20277049.

It is not an unprimeable number, because it can be changed into a prime (20277041) 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, 779874 + ... + 779899.

It is an arithmetic number, because the mean of its divisors is an integer number (5459209).

Almost surely, 2^20277049 is an apocalyptic number.

It is an amenable number.

20277049 is a deficient number, since it is larger than the sum of its proper divisors (1559787).

20277049 is a wasteful number, since it uses less digits than its factorization.

20277049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1559786.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 20277049 is about 4503.0044414813. The cubic root of 20277049 is about 272.6893961507.

The spelling of 20277049 in words is "twenty million, two hundred seventy-seven thousand, forty-nine".