19702045 has 8 divisors (see below), whose sum is σ = 25791840. Its totient is φ = 14328720.

The previous prime is 19702037. The next prime is 19702051. The reversal of 19702045 is 54020791.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 19702045 - 2³ = 19702037 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 179055 + ... + 179164.

It is an arithmetic number, because the mean of its divisors is an integer number (3223980).

Almost surely, 2^19702045 is an apocalyptic number.

It is an amenable number.

19702045 is a deficient number, since it is larger than the sum of its proper divisors (6089795).

19702045 is a wasteful number, since it uses less digits than its factorization.

19702045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358235.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 19702045 is about 4438.6985705272. The cubic root of 19702045 is about 270.0870546902.

The spelling of 19702045 in words is "nineteen million, seven hundred two thousand, forty-five".