20950147 has 2 divisors, whose sum is σ = 20950148. Its totient is φ = 20950146.

The previous prime is 20950099. The next prime is 20950169. The reversal of 20950147 is 74105902.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20950147 - 2⁷ = 20950019 is a prime.

It is not a weakly prime, because it can be changed into another prime (20950187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10475073 + 10475074.

It is an arithmetic number, because the mean of its divisors is an integer number (10475074).

Almost surely, 2^20950147 is an apocalyptic number.

20950147 is a deficient number, since it is larger than the sum of its proper divisors (1).

20950147 is an equidigital number, since it uses as much as digits as its factorization.

20950147 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 20950147 is about 4577.1330546533. The cubic root of 20950147 is about 275.6739261634.

The spelling of 20950147 in words is "twenty million, nine hundred fifty thousand, one hundred forty-seven".