20774497 has 8 divisors (see below), whose sum is σ = 21795840. Its totient is φ = 19763040.

The previous prime is 20774483. The next prime is 20774503. The reversal of 20774497 is 79447702.

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 20774497 - 2¹⁵ = 20741729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20774407) 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, 2029 + ... + 6757.

It is an arithmetic number, because the mean of its divisors is an integer number (2724480).

Almost surely, 2^20774497 is an apocalyptic number.

It is an amenable number.

20774497 is a deficient number, since it is larger than the sum of its proper divisors (1021343).

20774497 is a wasteful number, since it uses less digits than its factorization.

20774497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4943.

The product of its (nonzero) digits is 98784, while the sum is 40.

The square root of 20774497 is about 4557.9048915044. The cubic root of 20774497 is about 274.9013287879.

The spelling of 20774497 in words is "twenty million, seven hundred seventy-four thousand, four hundred ninety-seven".