20988033 has 16 divisors (see below), whose sum is σ = 30606336. Its totient is φ = 12687440.

The previous prime is 20988031. The next prime is 20988041. The reversal of 20988033 is 33088902.

It is a cyclic number.

It is not a de Polignac number, because 20988033 - 2¹ = 20988031 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 20987985 and 20988003.

It is not an unprimeable number, because it can be changed into a prime (20988031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20860 + ... + 21842.

It is an arithmetic number, because the mean of its divisors is an integer number (1912896).

Almost surely, 2^20988033 is an apocalyptic number.

It is an amenable number.

20988033 is a deficient number, since it is larger than the sum of its proper divisors (9618303).

20988033 is a wasteful number, since it uses less digits than its factorization.

20988033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1644.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 20988033 is about 4581.2698021400. The cubic root of 20988033 is about 275.8400012586.

The spelling of 20988033 in words is "twenty million, nine hundred eighty-eight thousand, thirty-three".