20425550 has 24 divisors (see below), whose sum is σ = 38110656. Its totient is φ = 8144640.

The previous prime is 20425549. The next prime is 20425571. The reversal of 20425550 is 5552402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30014 + ... + 30686.

It is an arithmetic number, because the mean of its divisors is an integer number (1587944).

Almost surely, 2^20425550 is an apocalyptic number.

20425550 is a deficient number, since it is larger than the sum of its proper divisors (17685106).

20425550 is a wasteful number, since it uses less digits than its factorization.

20425550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1292 (or 1287 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 23.

The square root of 20425550 is about 4519.4634637311. The cubic root of 20425550 is about 273.3534670211.

Adding to 20425550 its reverse (5552402), we get a palindrome (25977952).

The spelling of 20425550 in words is "twenty million, four hundred twenty-five thousand, five hundred fifty".