20508466 has 8 divisors (see below), whose sum is σ = 33559344. Its totient is φ = 9322020.

The previous prime is 20508451. The next prime is 20508473. The reversal of 20508466 is 66480502.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 466080 + ... + 466123.

It is an arithmetic number, because the mean of its divisors is an integer number (4194918).

Almost surely, 2^20508466 is an apocalyptic number.

20508466 is a deficient number, since it is larger than the sum of its proper divisors (13050878).

20508466 is a wasteful number, since it uses less digits than its factorization.

20508466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 932216.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 20508466 is about 4528.6273858643. The cubic root of 20508466 is about 273.7228536567.

Adding to 20508466 its reverse (66480502), we get a palindrome (86988968).

The spelling of 20508466 in words is "twenty million, five hundred eight thousand, four hundred sixty-six".