20049666 has 32 divisors (see below), whose sum is σ = 49354368. Its totient is φ = 5287680.

The previous prime is 20049649. The next prime is 20049709. The reversal of 20049666 is 66694002.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17815 + ... + 18906.

It is an arithmetic number, because the mean of its divisors is an integer number (1542324).

Almost surely, 2^20049666 is an apocalyptic number.

20049666 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20049666 is an abundant number, since it is smaller than the sum of its proper divisors (29304702).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20049666 is a wasteful number, since it uses less digits than its factorization.

20049666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36746.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 20049666 is about 4477.6853395477. The cubic root of 20049666 is about 271.6662663666. Note that the first 3 decimals are identical.

The spelling of 20049666 in words is "twenty million, forty-nine thousand, six hundred sixty-six".