19894201 has 2 divisors, whose sum is σ = 19894202. Its totient is φ = 19894200.

The previous prime is 19894183. The next prime is 19894213. The reversal of 19894201 is 10249891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19891600 + 2601 = 4460^2 + 51^2 .

It is a cyclic number.

It is not a de Polignac number, because 19894201 - 2⁷ = 19894073 is a prime.

It is not a weakly prime, because it can be changed into another prime (19894291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9947100 + 9947101.

It is an arithmetic number, because the mean of its divisors is an integer number (9947101).

Almost surely, 2^19894201 is an apocalyptic number.

It is an amenable number.

19894201 is a deficient number, since it is larger than the sum of its proper divisors (1).

19894201 is an equidigital number, since it uses as much as digits as its factorization.

19894201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 19894201 is about 4460.2915823968. The cubic root of 19894201 is about 270.9622773980.

The spelling of 19894201 in words is "nineteen million, eight hundred ninety-four thousand, two hundred one".