19897029 has 8 divisors (see below), whose sum is σ = 29477120. Its totient is φ = 13264668.

The previous prime is 19896997. The next prime is 19897037. The reversal of 19897029 is 92079891.

It is not a de Polignac number, because 19897029 - 2⁵ = 19896997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19897049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 368437 + ... + 368490.

It is an arithmetic number, because the mean of its divisors is an integer number (3684640).

Almost surely, 2^19897029 is an apocalyptic number.

It is an amenable number.

19897029 is a deficient number, since it is larger than the sum of its proper divisors (9580091).

19897029 is an equidigital number, since it uses as much as digits as its factorization.

19897029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 736936 (or 736930 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 45.

The square root of 19897029 is about 4460.6085907643. The cubic root of 19897029 is about 270.9751160641.

The spelling of 19897029 in words is "nineteen million, eight hundred ninety-seven thousand, twenty-nine".