20899075 has 12 divisors (see below), whose sum is σ = 26518888. Its totient is φ = 16329600.

The previous prime is 20899061. The next prime is 20899091. The reversal of 20899075 is 57099802.

It is not a de Polignac number, because 20899075 - 2¹¹ = 20897027 is a prime.

It is a Duffinian 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 11 ways as a sum of consecutive naturals, for example, 8646 + ... + 10795.

Almost surely, 2^20899075 is an apocalyptic number.

20899075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20899075 is a deficient number, since it is larger than the sum of its proper divisors (5619813).

20899075 is a wasteful number, since it uses less digits than its factorization.

20899075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19494 (or 19489 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 40.

The square root of 20899075 is about 4571.5506122103. The cubic root of 20899075 is about 275.4497324304.

The spelling of 20899075 in words is "twenty million, eight hundred ninety-nine thousand, seventy-five".