7021808038 has 32 divisors (see below), whose sum is σ = 12106672128. Its totient is φ = 2992077600.

The previous prime is 7021808009. The next prime is 7021808107. The reversal of 7021808038 is 8308081207.

It is a junction number, because it is equal to n+sod(n) for n = 7021807988 and 7021808006.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1910943 + ... + 1914613.

It is an arithmetic number, because the mean of its divisors is an integer number (378333504).

Almost surely, 2^7021808038 is an apocalyptic number.

7021808038 is a deficient number, since it is larger than the sum of its proper divisors (5084864090).

7021808038 is a wasteful number, since it uses less digits than its factorization.

7021808038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4428.

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 7021808038 is about 83796.2292588396. The cubic root of 7021808038 is about 1914.9156603095.

The spelling of 7021808038 in words is "seven billion, twenty-one million, eight hundred eight thousand, thirty-eight".