20299529 has 4 divisors (see below), whose sum is σ = 20314320. Its totient is φ = 20284740.

The previous prime is 20299493. The next prime is 20299577. The reversal of 20299529 is 92599202.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20299529 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20299492 and 20299501.

It is not an unprimeable number, because it can be changed into a prime (20299229) 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, 5099 + ... + 8160.

It is an arithmetic number, because the mean of its divisors is an integer number (5078580).

Almost surely, 2^20299529 is an apocalyptic number.

It is an amenable number.

20299529 is a deficient number, since it is larger than the sum of its proper divisors (14791).

20299529 is a wasteful number, since it uses less digits than its factorization.

20299529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14790.

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 20299529 is about 4505.4998612807. The cubic root of 20299529 is about 272.7901306259.

The spelling of 20299529 in words is "twenty million, two hundred ninety-nine thousand, five hundred twenty-nine".