20514947 has 2 divisors, whose sum is σ = 20514948. Its totient is φ = 20514946.

The previous prime is 20514943. The next prime is 20514979. The reversal of 20514947 is 74941502.

It is a happy number.

It is an a-pointer prime, because the next prime (20514979) can be obtained adding 20514947 to its sum of digits (32).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20514947 - 2² = 20514943 is a prime.

It is not a weakly prime, because it can be changed into another prime (20514941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10257473 + 10257474.

It is an arithmetic number, because the mean of its divisors is an integer number (10257474).

Almost surely, 2^20514947 is an apocalyptic number.

20514947 is a deficient number, since it is larger than the sum of its proper divisors (1).

20514947 is an equidigital number, since it uses as much as digits as its factorization.

20514947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 20514947 is about 4529.3428883228. The cubic root of 20514947 is about 273.7516842053.

The spelling of 20514947 in words is "twenty million, five hundred fourteen thousand, nine hundred forty-seven".