20335988 has 12 divisors (see below), whose sum is σ = 35620452. Its totient is φ = 10158720.

The previous prime is 20335981. The next prime is 20335993. The reversal of 20335988 is 88953302.

It can be written as a sum of positive squares in 2 ways, for example, as 10837264 + 9498724 = 3292^2 + 3082^2 .

It is a super-2 number, since 2×20335988² = 827104815872288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20335981) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 5678 + ... + 8538.

It is an arithmetic number, because the mean of its divisors is an integer number (2968371).

Almost surely, 2^20335988 is an apocalyptic number.

It is an amenable number.

20335988 is a deficient number, since it is larger than the sum of its proper divisors (15284464).

20335988 is a wasteful number, since it uses less digits than its factorization.

20335988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4642 (or 4640 counting only the distinct ones).

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

The square root of 20335988 is about 4509.5441011260. The cubic root of 20335988 is about 272.9533479926.

The spelling of 20335988 in words is "twenty million, three hundred thirty-five thousand, nine hundred eighty-eight".