20492533 has 4 divisors (see below), whose sum is σ = 20684160. Its totient is φ = 20300908.

The previous prime is 20492513. The next prime is 20492543. The reversal of 20492533 is 33529402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 33529402 = 2 ⋅16764701.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20492533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20492513) 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, 95653 + ... + 95866.

It is an arithmetic number, because the mean of its divisors is an integer number (5171040).

Almost surely, 2^20492533 is an apocalyptic number.

It is an amenable number.

20492533 is a deficient number, since it is larger than the sum of its proper divisors (191627).

20492533 is a wasteful number, since it uses less digits than its factorization.

20492533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191626.

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 20492533 is about 4526.8679017617. The cubic root of 20492533 is about 273.6519503181.

It can be divided in two parts, 20492 and 533, that added together give a square (21025 = 145²).

The spelling of 20492533 in words is "twenty million, four hundred ninety-two thousand, five hundred thirty-three".