20520049 has 16 divisors (see below), whose sum is σ = 23151744. Its totient is φ = 18025600.

The previous prime is 20520043. The next prime is 20520053. The reversal of 20520049 is 94002502.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20520049 - 2³ = 20520041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20520041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77892 + ... + 78154.

It is an arithmetic number, because the mean of its divisors is an integer number (1446984).

Almost surely, 2^20520049 is an apocalyptic number.

It is an amenable number.

20520049 is a deficient number, since it is larger than the sum of its proper divisors (2631695).

20520049 is a wasteful number, since it uses less digits than its factorization.

20520049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 20520049 is about 4529.9060696663. The cubic root of 20520049 is about 273.7743760394.

The spelling of 20520049 in words is "twenty million, five hundred twenty thousand, forty-nine".