20791533 has 12 divisors (see below), whose sum is σ = 32248320. Its totient is φ = 11880792.

The previous prime is 20791523. The next prime is 20791543. The reversal of 20791533 is 33519702.

It is an interprime number because it is at equal distance from previous prime (20791523) and next prime (20791543).

It is not a de Polignac number, because 20791533 - 2⁵ = 20791501 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20791533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20791513) 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 11 ways as a sum of consecutive naturals, for example, 70573 + ... + 70866.

It is an arithmetic number, because the mean of its divisors is an integer number (2687360).

Almost surely, 2^20791533 is an apocalyptic number.

It is an amenable number.

20791533 is a deficient number, since it is larger than the sum of its proper divisors (11456787).

20791533 is a wasteful number, since it uses less digits than its factorization.

20791533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141456 (or 141449 counting only the distinct ones).

The product of its (nonzero) digits is 5670, while the sum is 30.

The square root of 20791533 is about 4559.7733496304. The cubic root of 20791533 is about 274.9764519782.

The spelling of 20791533 in words is "twenty million, seven hundred ninety-one thousand, five hundred thirty-three".