2021434347 has 4 divisors (see below), whose sum is σ = 2695245800. Its totient is φ = 1347622896.

The previous prime is 2021434307. The next prime is 2021434367. The reversal of 2021434347 is 7434341202.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2021434347 - 2⁸ = 2021434091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2021434307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 336905722 + ... + 336905727.

It is an arithmetic number, because the mean of its divisors is an integer number (673811450).

Almost surely, 2^2021434347 is an apocalyptic number.

2021434347 is a deficient number, since it is larger than the sum of its proper divisors (673811453).

2021434347 is an equidigital number, since it uses as much as digits as its factorization.

2021434347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 673811452.

The product of its (nonzero) digits is 16128, while the sum is 30.

The square root of 2021434347 is about 44960.3641777955. The cubic root of 2021434347 is about 1264.4059966946.

Adding to 2021434347 its reverse (7434341202), we get a palindrome (9455775549).

The spelling of 2021434347 in words is "two billion, twenty-one million, four hundred thirty-four thousand, three hundred forty-seven".