20550010 has 16 divisors (see below), whose sum is σ = 39835656. Its totient is φ = 7587648.

The previous prime is 20550007. The next prime is 20550037. The reversal of 20550010 is 1005502.

It can be written as a sum of positive squares in 4 ways, for example, as 11229201 + 9320809 = 3351^2 + 3053^2 .

It is a super-2 number, since 2×20550010² = 844605822000200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 78909 + ... + 79168.

Almost surely, 2^20550010 is an apocalyptic number.

20550010 is a deficient number, since it is larger than the sum of its proper divisors (19285646).

20550010 is a wasteful number, since it uses less digits than its factorization.

20550010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158097.

The product of its (nonzero) digits is 50, while the sum is 13.

The square root of 20550010 is about 4533.2118856281. The cubic root of 20550010 is about 273.9075557925.

Adding to 20550010 its reverse (1005502), we get a palindrome (21555512).

The spelling of 20550010 in words is "twenty million, five hundred fifty thousand, ten".