20550392 has 16 divisors (see below), whose sum is σ = 39573960. Its totient is φ = 9997344.

The previous prime is 20550391. The next prime is 20550403. The reversal of 20550392 is 29305502.

It is a super-2 number, since 2×20550392² = 844637222707328, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20550391) 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, 34418 + ... + 35009.

Almost surely, 2^20550392 is an apocalyptic number.

It is an amenable number.

20550392 is a deficient number, since it is larger than the sum of its proper divisors (19023568).

20550392 is a wasteful number, since it uses less digits than its factorization.

20550392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69470 (or 69466 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 20550392 is about 4533.2540189140. The cubic root of 20550392 is about 273.9092529861.

Adding to 20550392 its reverse (29305502), we get a palindrome (49855894).

The spelling of 20550392 in words is "twenty million, five hundred fifty thousand, three hundred ninety-two".