20514818 has 16 divisors (see below), whose sum is σ = 32845824. Its totient is φ = 9576000.

The previous prime is 20514787. The next prime is 20514829. The reversal of 20514818 is 81841502.

20514818 = 1302² + 1303² + ... + 1313².

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1943 + ... + 6693.

It is an arithmetic number, because the mean of its divisors is an integer number (2052864).

Almost surely, 2^20514818 is an apocalyptic number.

20514818 is a deficient number, since it is larger than the sum of its proper divisors (12331006).

20514818 is a wasteful number, since it uses less digits than its factorization.

20514818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4897.

The product of its (nonzero) digits is 2560, while the sum is 29.

The square root of 20514818 is about 4529.3286478241. The cubic root of 20514818 is about 273.7511104116.

The spelling of 20514818 in words is "twenty million, five hundred fourteen thousand, eight hundred eighteen".