20797445 has 8 divisors (see below), whose sum is σ = 25030944. Its totient is φ = 16588624.

The previous prime is 20797411. The next prime is 20797463. The reversal of 20797445 is 54479702.

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 20797445 - 2²² = 16603141 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20797399 and 20797408.

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, 4259 + ... + 7728.

It is an arithmetic number, because the mean of its divisors is an integer number (3128868).

Almost surely, 2^20797445 is an apocalyptic number.

It is an amenable number.

20797445 is a deficient number, since it is larger than the sum of its proper divisors (4233499).

20797445 is a wasteful number, since it uses less digits than its factorization.

20797445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12339.

The product of its (nonzero) digits is 70560, while the sum is 38.

The square root of 20797445 is about 4560.4215813892. The cubic root of 20797445 is about 275.0025123737.

The spelling of 20797445 in words is "twenty million, seven hundred ninety-seven thousand, four hundred forty-five".