20674999 has 16 divisors (see below), whose sum is σ = 22579200. Its totient is φ = 18871776.

The previous prime is 20674993. The next prime is 20675023. The reversal of 20674999 is 99947602.

It is not a de Polignac number, because 20674999 - 2³ = 20674991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20674991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92602 + ... + 92824.

It is an arithmetic number, because the mean of its divisors is an integer number (1411200).

Almost surely, 2^20674999 is an apocalyptic number.

20674999 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

20674999 is a deficient number, since it is larger than the sum of its proper divisors (1904201).

20674999 is a wasteful number, since it uses less digits than its factorization.

20674999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414.

The product of its (nonzero) digits is 244944, while the sum is 46.

The square root of 20674999 is about 4546.9769077927. The cubic root of 20674999 is about 274.4617527055.

The spelling of 20674999 in words is "twenty million, six hundred seventy-four thousand, nine hundred ninety-nine".