19420797 has 8 divisors (see below), whose sum is σ = 28248480. Its totient is φ = 11770160.

The previous prime is 19420789. The next prime is 19420801. The reversal of 19420797 is 79702491.

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

It is a cyclic number.

It is not a de Polignac number, because 19420797 - 2³ = 19420789 is a prime.

It is a super-2 number, since 2×19420797² = 754334712230418, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19420727) 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 7 ways as a sum of consecutive naturals, for example, 294222 + ... + 294287.

It is an arithmetic number, because the mean of its divisors is an integer number (3531060).

Almost surely, 2^19420797 is an apocalyptic number.

It is an amenable number.

19420797 is a deficient number, since it is larger than the sum of its proper divisors (8827683).

19420797 is a wasteful number, since it uses less digits than its factorization.

19420797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 588523.

The product of its (nonzero) digits is 31752, while the sum is 39.

The square root of 19420797 is about 4406.9033345423. The cubic root of 19420797 is about 268.7957202187.

The spelling of 19420797 in words is "nineteen million, four hundred twenty thousand, seven hundred ninety-seven".