19804153 has 2 divisors, whose sum is σ = 19804154. Its totient is φ = 19804152.

The previous prime is 19804111. The next prime is 19804157. The reversal of 19804153 is 35140891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12981609 + 6822544 = 3603^2 + 2612^2 .

It is an emirp because it is prime and its reverse (35140891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19804153 - 2¹⁷ = 19673081 is a prime.

It is not a weakly prime, because it can be changed into another prime (19804157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9902076 + 9902077.

It is an arithmetic number, because the mean of its divisors is an integer number (9902077).

Almost surely, 2^19804153 is an apocalyptic number.

It is an amenable number.

19804153 is a deficient number, since it is larger than the sum of its proper divisors (1).

19804153 is an equidigital number, since it uses as much as digits as its factorization.

19804153 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 19804153 is about 4450.1857264613. The cubic root of 19804153 is about 270.5528361796.

The spelling of 19804153 in words is "nineteen million, eight hundred four thousand, one hundred fifty-three".