20051299 has 4 divisors (see below), whose sum is σ = 20593264. Its totient is φ = 19509336.

The previous prime is 20051293. The next prime is 20051303. The reversal of 20051299 is 99215002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20051299 - 2⁹ = 20050787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20051293) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 270927 + ... + 271000.

It is an arithmetic number, because the mean of its divisors is an integer number (5148316).

Almost surely, 2^20051299 is an apocalyptic number.

20051299 is a deficient number, since it is larger than the sum of its proper divisors (541965).

20051299 is an equidigital number, since it uses as much as digits as its factorization.

20051299 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541964.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 20051299 is about 4477.8676845124. The cubic root of 20051299 is about 271.6736417010.

The spelling of 20051299 in words is "twenty million, fifty-one thousand, two hundred ninety-nine".