20935998 has 12 divisors (see below), whose sum is σ = 45361368. Its totient is φ = 6978660.

The previous prime is 20935997. The next prime is 20936017. The reversal of 20935998 is 89953902.

20935998 is a `hidden beast` number, since 209 + 359 + 98 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20935997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 581538 + ... + 581573.

It is an arithmetic number, because the mean of its divisors is an integer number (3780114).

Almost surely, 2^20935998 is an apocalyptic number.

20935998 is an abundant number, since it is smaller than the sum of its proper divisors (24425370).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20935998 is a wasteful number, since it uses less digits than its factorization.

20935998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1163119 (or 1163116 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 45.

The square root of 20935998 is about 4575.5871754344. The cubic root of 20935998 is about 275.6118519960.

The spelling of 20935998 in words is "twenty million, nine hundred thirty-five thousand, nine hundred ninety-eight".