20196929 has 4 divisors (see below), whose sum is σ = 20219076. Its totient is φ = 20174784.

The previous prime is 20196923. The next prime is 20196973. The reversal of 20196929 is 92969102.

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 3713329 + 16483600 = 1927^2 + 4060^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20196929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20196892 and 20196901.

It is not an unprimeable number, because it can be changed into a prime (20196923) 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, 9644 + ... + 11549.

It is an arithmetic number, because the mean of its divisors is an integer number (5054769).

Almost surely, 2^20196929 is an apocalyptic number.

It is an amenable number.

20196929 is a deficient number, since it is larger than the sum of its proper divisors (22147).

20196929 is an equidigital number, since it uses as much as digits as its factorization.

20196929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22146.

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 20196929 is about 4494.0993535969. The cubic root of 20196929 is about 272.3297660202.

The spelling of 20196929 in words is "twenty million, one hundred ninety-six thousand, nine hundred twenty-nine".