20900398 has 16 divisors (see below), whose sum is σ = 31968000. Its totient is φ = 10246392.

The previous prime is 20900389. The next prime is 20900401. The reversal of 20900398 is 89300902.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27913 + ... + 28651.

It is an arithmetic number, because the mean of its divisors is an integer number (1998000).

Almost surely, 2^20900398 is an apocalyptic number.

20900398 is a deficient number, since it is larger than the sum of its proper divisors (11067602).

20900398 is a wasteful number, since it uses less digits than its factorization.

20900398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 999.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 20900398 is about 4571.6953091824. The cubic root of 20900398 is about 275.4555446862.

The spelling of 20900398 in words is "twenty million, nine hundred thousand, three hundred ninety-eight".