20533372 has 12 divisors (see below), whose sum is σ = 36904840. Its totient is φ = 9989136.

The previous prime is 20533369. The next prime is 20533379. The reversal of 20533372 is 27333502.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20533379) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69222 + ... + 69517.

Almost surely, 2^20533372 is an apocalyptic number.

It is an amenable number.

20533372 is a deficient number, since it is larger than the sum of its proper divisors (16371468).

20533372 is a wasteful number, since it uses less digits than its factorization.

20533372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138780 (or 138778 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 25.

The square root of 20533372 is about 4531.3763913407. The cubic root of 20533372 is about 273.8336141517.

Adding to 20533372 its reverse (27333502), we get a palindrome (47866874).

The spelling of 20533372 in words is "twenty million, five hundred thirty-three thousand, three hundred seventy-two".