20933500 has 48 divisors (see below), whose sum is σ = 52258752. Its totient is φ = 7176000.

The previous prime is 20933489. The next prime is 20933503. The reversal of 20933500 is 533902.

It is a super-2 number, since 2×20933500² = 876422844500000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20933503) 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 15 ways as a sum of consecutive naturals, for example, 510 + ... + 6490.

It is an arithmetic number, because the mean of its divisors is an integer number (1088724).

Almost surely, 2^20933500 is an apocalyptic number.

20933500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20933500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26129376).

20933500 is an abundant number, since it is smaller than the sum of its proper divisors (31325252).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20933500 is a wasteful number, since it uses less digits than its factorization.

20933500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6007 (or 5995 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 22.

The square root of 20933500 is about 4575.3141968612. The cubic root of 20933500 is about 275.6008899233.

The spelling of 20933500 in words is "twenty million, nine hundred thirty-three thousand, five hundred".