20853398 has 4 divisors (see below), whose sum is σ = 31280100. Its totient is φ = 10426698.

The previous prime is 20853389. The next prime is 20853401. The reversal of 20853398 is 89335802.

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

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 as a sum of consecutive naturals, namely, 5213348 + ... + 5213351.

It is an arithmetic number, because the mean of its divisors is an integer number (7820025).

Almost surely, 2^20853398 is an apocalyptic number.

20853398 is a deficient number, since it is larger than the sum of its proper divisors (10426702).

20853398 is a wasteful number, since it uses less digits than its factorization.

20853398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10426701.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 20853398 is about 4566.5520910201. The cubic root of 20853398 is about 275.2489118236.

The spelling of 20853398 in words is "twenty million, eight hundred fifty-three thousand, three hundred ninety-eight".