2020838521 has 4 divisors (see below), whose sum is σ = 2176287652. Its totient is φ = 1865389392.

The previous prime is 2020838507. The next prime is 2020838609. The reversal of 2020838521 is 1258380202.

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 1366041600 + 654796921 = 36960^2 + 25589^2 .

It is a cyclic number.

It is not a de Polignac number, because 2020838521 - 2⁹ = 2020838009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2020838321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77724546 + ... + 77724571.

It is an arithmetic number, because the mean of its divisors is an integer number (544071913).

Almost surely, 2^2020838521 is an apocalyptic number.

It is an amenable number.

2020838521 is a deficient number, since it is larger than the sum of its proper divisors (155449131).

2020838521 is a wasteful number, since it uses less digits than its factorization.

2020838521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155449130.

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 2020838521 is about 44953.7375643005. The cubic root of 2020838521 is about 1264.2817548826.

The spelling of 2020838521 in words is "two billion, twenty million, eight hundred thirty-eight thousand, five hundred twenty-one".