20049867 has 6 divisors (see below), whose sum is σ = 28960932. Its totient is φ = 13366572.

The previous prime is 20049833. The next prime is 20049881. The reversal of 20049867 is 76894002.

It is not a de Polignac number, because 20049867 - 2¹⁸ = 19787723 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20049067) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1113873 + ... + 1113890.

It is an arithmetic number, because the mean of its divisors is an integer number (4826822).

Almost surely, 2^20049867 is an apocalyptic number.

20049867 is a deficient number, since it is larger than the sum of its proper divisors (8911065).

20049867 is a wasteful number, since it uses less digits than its factorization.

20049867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2227769 (or 2227766 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 20049867 is about 4477.7077841235. The cubic root of 20049867 is about 271.6671741912.

The spelling of 20049867 in words is "twenty million, forty-nine thousand, eight hundred sixty-seven".