20718466 has 8 divisors (see below), whose sum is σ = 31113360. Its totient is φ = 10347348.

The previous prime is 20718463. The next prime is 20718479. The reversal of 20718466 is 66481702.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (20718463) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3576 + ... + 7363.

It is an arithmetic number, because the mean of its divisors is an integer number (3889170).

Almost surely, 2^20718466 is an apocalyptic number.

20718466 is a deficient number, since it is larger than the sum of its proper divisors (10394894).

20718466 is a wasteful number, since it uses less digits than its factorization.

20718466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11888.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 20718466 is about 4551.7541673513. The cubic root of 20718466 is about 274.6539603442.

The spelling of 20718466 in words is "twenty million, seven hundred eighteen thousand, four hundred sixty-six".