20478662 has 16 divisors (see below), whose sum is σ = 31819392. Its totient is φ = 9874560.

The previous prime is 20478643. The next prime is 20478677. The reversal of 20478662 is 26687402.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34238 + ... + 34830.

It is an arithmetic number, because the mean of its divisors is an integer number (1988712).

Almost surely, 2^20478662 is an apocalyptic number.

20478662 is a deficient number, since it is larger than the sum of its proper divisors (11340730).

20478662 is a wasteful number, since it uses less digits than its factorization.

20478662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1183.

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 20478662 is about 4525.3355676679. The cubic root of 20478662 is about 273.5901931411.

The spelling of 20478662 in words is "twenty million, four hundred seventy-eight thousand, six hundred sixty-two".