20938533 has 48 divisors (see below), whose sum is σ = 37034496. Its totient is φ = 10385760.

The previous prime is 20938531. The next prime is 20938537. The reversal of 20938533 is 33583902.

It is not a de Polignac number, because 20938533 - 2¹ = 20938531 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 = 20938494 and 20938503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20938531) 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 47 ways as a sum of consecutive naturals, for example, 36910 + ... + 37472.

It is an arithmetic number, because the mean of its divisors is an integer number (771552).

Almost surely, 2^20938533 is an apocalyptic number.

20938533 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

20938533 is a deficient number, since it is larger than the sum of its proper divisors (16095963).

20938533 is a wasteful number, since it uses less digits than its factorization.

20938533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614 (or 607 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 20938533 is about 4575.8641806767. The cubic root of 20938533 is about 275.6229755457.

20938533 divided by its sum of digits (33) gives a triangular number (634501 = T₁₁₂₆).

The spelling of 20938533 in words is "twenty million, nine hundred thirty-eight thousand, five hundred thirty-three".