20467399 has 6 divisors (see below), whose sum is σ = 20767280. Its totient is φ = 20168616.

The previous prime is 20467387. The next prime is 20467429. The reversal of 20467399 is 99376402.

It is not a de Polignac number, because 20467399 - 2⁵ = 20467367 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 (20467319) 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 5 ways as a sum of consecutive naturals, for example, 39957 + ... + 40465.

Almost surely, 2^20467399 is an apocalyptic number.

20467399 is a deficient number, since it is larger than the sum of its proper divisors (299881).

20467399 is an frugal number, since it uses more digits than its factorization.

20467399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1097 (or 588 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 20467399 is about 4524.0909584136. The cubic root of 20467399 is about 273.5400269171.

The spelling of 20467399 in words is "twenty million, four hundred sixty-seven thousand, three hundred ninety-nine".