20550372 has 12 divisors (see below), whose sum is σ = 47950896. Its totient is φ = 6850120.

The previous prime is 20550347. The next prime is 20550377. The reversal of 20550372 is 27305502.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (20550377) 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, 856254 + ... + 856277.

It is an arithmetic number, because the mean of its divisors is an integer number (3995908).

Almost surely, 2^20550372 is an apocalyptic number.

It is an amenable number.

20550372 is an abundant number, since it is smaller than the sum of its proper divisors (27400524).

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

20550372 is a wasteful number, since it uses less digits than its factorization.

20550372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1712538 (or 1712536 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 24.

The square root of 20550372 is about 4533.2518129925. The cubic root of 20550372 is about 273.9091641283.

Adding to 20550372 its reverse (27305502), we get a palindrome (47855874).

The spelling of 20550372 in words is "twenty million, five hundred fifty thousand, three hundred seventy-two".