34800021 has 12 divisors (see below), whose sum is σ = 51493260. Its totient is φ = 22633920.

The previous prime is 34799981. The next prime is 34800043. The reversal of 34800021 is 12000843.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 15563025 + 19236996 = 3945^2 + 4386^2 .

It is not a de Polignac number, because 34800021 - 2⁶ = 34799957 is a prime.

It is a super-2 number, since 2×34800021² = 2422082923200882, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 34799967 and 34800003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (34800061) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46786 + ... + 47523.

It is an arithmetic number, because the mean of its divisors is an integer number (4291105).

Almost surely, 2^34800021 is an apocalyptic number.

It is an amenable number.

34800021 is a deficient number, since it is larger than the sum of its proper divisors (16693239).

34800021 is a wasteful number, since it uses less digits than its factorization.

34800021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94356 (or 94353 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 34800021 is about 5899.1542614175. The cubic root of 34800021 is about 326.4824458776.

Adding to 34800021 its reverse (12000843), we get a palindrome (46800864).

The spelling of 34800021 in words is "thirty-four million, eight hundred thousand, twenty-one".