20903284 has 6 divisors (see below), whose sum is σ = 36580754. Its totient is φ = 10451640.

The previous prime is 20903279. The next prime is 20903291. The reversal of 20903284 is 48230902.

It can be written as a sum of positive squares in only one way, i.e., 20903184 + 100 = 4572^2 + 10^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2612907 + ... + 2612914.

Almost surely, 2^20903284 is an apocalyptic number.

It is an amenable number.

20903284 is a deficient number, since it is larger than the sum of its proper divisors (15677470).

20903284 is a wasteful number, since it uses less digits than its factorization.

20903284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5225825 (or 5225823 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 20903284 is about 4572.0109361199. The cubic root of 20903284 is about 275.4682227241.

The spelling of 20903284 in words is "twenty million, nine hundred three thousand, two hundred eighty-four".