20049667 has 8 divisors (see below), whose sum is σ = 21934080. Its totient is φ = 18175560.

The previous prime is 20049649. The next prime is 20049709. The reversal of 20049667 is 76694002.

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

It is a cyclic number.

It is not a de Polignac number, because 20049667 - 2¹⁹ = 19525379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20049607) by changing a digit.

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, 1834 + ... + 6592.

It is an arithmetic number, because the mean of its divisors is an integer number (2741760).

Almost surely, 2^20049667 is an apocalyptic number.

20049667 is a deficient number, since it is larger than the sum of its proper divisors (1884413).

20049667 is a wasteful number, since it uses less digits than its factorization.

20049667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5153.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 20049667 is about 4477.6854512125. The cubic root of 20049667 is about 271.6662708832. Note that the first 3 decimals are identical.

The spelling of 20049667 in words is "twenty million, forty-nine thousand, six hundred sixty-seven".