20299001 has 4 divisors (see below), whose sum is σ = 20428452. Its totient is φ = 20169552.

The previous prime is 20298997. The next prime is 20299039. The reversal of 20299001 is 10099202.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6786025 + 13512976 = 2605^2 + 3676^2 .

It is a cyclic number.

It is not a de Polignac number, because 20299001 - 2² = 20298997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20290001) 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, 64490 + ... + 64803.

It is an arithmetic number, because the mean of its divisors is an integer number (5107113).

Almost surely, 2^20299001 is an apocalyptic number.

It is an amenable number.

20299001 is a deficient number, since it is larger than the sum of its proper divisors (129451).

20299001 is a wasteful number, since it uses less digits than its factorization.

20299001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129450.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 20299001 is about 4505.4412658473. The cubic root of 20299001 is about 272.7877654736.

The spelling of 20299001 in words is "twenty million, two hundred ninety-nine thousand, one".