20402104 has 16 divisors (see below), whose sum is σ = 39917520. Its totient is φ = 9757440.

The previous prime is 20402099. The next prime is 20402119. The reversal of 20402104 is 40120402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55257 + ... + 55624.

It is an arithmetic number, because the mean of its divisors is an integer number (2494845).

Almost surely, 2^20402104 is an apocalyptic number.

It is an amenable number.

20402104 is a deficient number, since it is larger than the sum of its proper divisors (19515416).

20402104 is a wasteful number, since it uses less digits than its factorization.

20402104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110910 (or 110906 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 20402104 is about 4516.8688269641. The cubic root of 20402104 is about 273.2488350085.

Adding to 20402104 its reverse (40120402), we get a palindrome (60522506).

The spelling of 20402104 in words is "twenty million, four hundred two thousand, one hundred four".