20672299 has 2 divisors, whose sum is σ = 20672300. Its totient is φ = 20672298.

The previous prime is 20672287. The next prime is 20672321. The reversal of 20672299 is 99227602.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20672299 is a prime.

It is not a weakly prime, because it can be changed into another prime (20672269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10336149 + 10336150.

It is an arithmetic number, because the mean of its divisors is an integer number (10336150).

Almost surely, 2^20672299 is an apocalyptic number.

20672299 is a deficient number, since it is larger than the sum of its proper divisors (1).

20672299 is an equidigital number, since it uses as much as digits as its factorization.

20672299 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 20672299 is about 4546.6799975367. The cubic root of 20672299 is about 274.4498046357.

The spelling of 20672299 in words is "twenty million, six hundred seventy-two thousand, two hundred ninety-nine".