20550384 has 30 divisors (see below), whose sum is σ = 57512936. Its totient is φ = 6850080.

The previous prime is 20550377. The next prime is 20550391. The reversal of 20550384 is 48305502.

It is an interprime number because it is at equal distance from previous prime (20550377) and next prime (20550391).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 71212 + ... + 71499.

Almost surely, 2^20550384 is an apocalyptic number.

20550384 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20550384 is an abundant number, since it is smaller than the sum of its proper divisors (36962552).

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

20550384 is a wasteful number, since it uses less digits than its factorization.

20550384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142725 (or 142716 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 20550384 is about 4533.2531365455. The cubic root of 20550384 is about 273.9092174430.

Adding to 20550384 its reverse (48305502), we get a palindrome (68855886).

The spelling of 20550384 in words is "twenty million, five hundred fifty thousand, three hundred eighty-four".