20299885 has 32 divisors (see below), whose sum is σ = 27141120. Its totient is φ = 14515200.

The previous prime is 20299883. The next prime is 20299927. The reversal of 20299885 is 58899202.

It is not a de Polignac number, because 20299885 - 2¹ = 20299883 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20299883) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 179589 + ... + 179701.

It is an arithmetic number, because the mean of its divisors is an integer number (848160).

Almost surely, 2^20299885 is an apocalyptic number.

It is an amenable number.

20299885 is a deficient number, since it is larger than the sum of its proper divisors (6841235).

20299885 is a wasteful number, since it uses less digits than its factorization.

20299885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229.

The product of its (nonzero) digits is 103680, while the sum is 43.

The square root of 20299885 is about 4505.5393683776. The cubic root of 20299885 is about 272.7917252889.

The spelling of 20299885 in words is "twenty million, two hundred ninety-nine thousand, eight hundred eighty-five".