20610929 has 2 divisors, whose sum is σ = 20610930. Its totient is φ = 20610928.

The previous prime is 20610923. The next prime is 20610943. The reversal of 20610929 is 92901602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17181025 + 3429904 = 4145^2 + 1852^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20610929 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20610923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10305464 + 10305465.

It is an arithmetic number, because the mean of its divisors is an integer number (10305465).

Almost surely, 2^20610929 is an apocalyptic number.

It is an amenable number.

20610929 is a deficient number, since it is larger than the sum of its proper divisors (1).

20610929 is an equidigital number, since it uses as much as digits as its factorization.

20610929 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 20610929 is about 4539.9261007201. The cubic root of 20610929 is about 274.1779484132.

The spelling of 20610929 in words is "twenty million, six hundred ten thousand, nine hundred twenty-nine".