20828518 has 16 divisors (see below), whose sum is σ = 31804416. Its totient is φ = 10228680.

The previous prime is 20828477. The next prime is 20828527. The reversal of 20828518 is 81582802.

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, 44755 + ... + 45217.

It is an arithmetic number, because the mean of its divisors is an integer number (1987776).

Almost surely, 2^20828518 is an apocalyptic number.

20828518 is a deficient number, since it is larger than the sum of its proper divisors (10975898).

20828518 is a wasteful number, since it uses less digits than its factorization.

20828518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 819.

The product of its (nonzero) digits is 10240, while the sum is 34.

The square root of 20828518 is about 4563.8271220545. The cubic root of 20828518 is about 275.1394026005.

The spelling of 20828518 in words is "twenty million, eight hundred twenty-eight thousand, five hundred eighteen".