19700397 has 24 divisors (see below), whose sum is σ = 31262400. Its totient is φ = 11899008.

The previous prime is 19700363. The next prime is 19700449. The reversal of 19700397 is 79300791.

It is not a de Polignac number, because 19700397 - 2⁸ = 19700141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19700347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1429 + ... + 6437.

It is an arithmetic number, because the mean of its divisors is an integer number (1302600).

Almost surely, 2^19700397 is an apocalyptic number.

It is an amenable number.

19700397 is a deficient number, since it is larger than the sum of its proper divisors (11562003).

19700397 is a wasteful number, since it uses less digits than its factorization.

19700397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5057 (or 5054 counting only the distinct ones).

The product of its (nonzero) digits is 11907, while the sum is 36.

The square root of 19700397 is about 4438.5129266456. The cubic root of 19700397 is about 270.0795239004.

The spelling of 19700397 in words is "nineteen million, seven hundred thousand, three hundred ninety-seven".