20533422 has 32 divisors (see below), whose sum is σ = 50545152. Its totient is φ = 5415264.

The previous prime is 20533391. The next prime is 20533427. The reversal of 20533422 is 22433502.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20533427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18258 + ... + 19349.

It is an arithmetic number, because the mean of its divisors is an integer number (1579536).

Almost surely, 2^20533422 is an apocalyptic number.

20533422 is an abundant number, since it is smaller than the sum of its proper divisors (30011730).

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

20533422 is a wasteful number, since it uses less digits than its factorization.

20533422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37632.

The product of its (nonzero) digits is 1440, while the sum is 21.

The square root of 20533422 is about 4531.3819084248. The cubic root of 20533422 is about 273.8338364186.

Adding to 20533422 its reverse (22433502), we get a palindrome (42966924).

The spelling of 20533422 in words is "twenty million, five hundred thirty-three thousand, four hundred twenty-two".