19953953 has 2 divisors, whose sum is σ = 19953954. Its totient is φ = 19953952.

The previous prime is 19953919. The next prime is 19953959. The reversal of 19953953 is 35935991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18939904 + 1014049 = 4352^2 + 1007^2 .

It is a cyclic number.

It is not a de Polignac number, because 19953953 - 2⁸ = 19953697 is a prime.

It is not a weakly prime, because it can be changed into another prime (19953959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9976976 + 9976977.

It is an arithmetic number, because the mean of its divisors is an integer number (9976977).

Almost surely, 2^19953953 is an apocalyptic number.

It is an amenable number.

19953953 is a deficient number, since it is larger than the sum of its proper divisors (1).

19953953 is an equidigital number, since it uses as much as digits as its factorization.

19953953 is an evil number, because the sum of its binary digits is even.

The product of its digits is 164025, while the sum is 44.

The square root of 19953953 is about 4466.9847772295. The cubic root of 19953953 is about 271.2332836011.

The spelling of 19953953 in words is "nineteen million, nine hundred fifty-three thousand, nine hundred fifty-three".