20299513 has 16 divisors (see below), whose sum is σ = 23901696. Its totient is φ = 17061120.

The previous prime is 20299493. The next prime is 20299577. The reversal of 20299513 is 31599202.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20299513 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (20299613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5370 + ... + 8332.

It is an arithmetic number, because the mean of its divisors is an integer number (1493856).

Almost surely, 2^20299513 is an apocalyptic number.

It is an amenable number.

20299513 is a deficient number, since it is larger than the sum of its proper divisors (3602183).

20299513 is a wasteful number, since it uses less digits than its factorization.

20299513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3024.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 20299513 is about 4505.4980856727. The cubic root of 20299513 is about 272.7900589553.

The spelling of 20299513 in words is "twenty million, two hundred ninety-nine thousand, five hundred thirteen".