20497011 has 8 divisors (see below), whose sum is σ = 27402240. Its totient is φ = 13628232.

The previous prime is 20497003. The next prime is 20497021. The reversal of 20497011 is 11079402.

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

It is not a de Polignac number, because 20497011 - 2³ = 20497003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20497021) 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, 7771 + ... + 10068.

It is an arithmetic number, because the mean of its divisors is an integer number (3425280).

Almost surely, 2^20497011 is an apocalyptic number.

20497011 is a deficient number, since it is larger than the sum of its proper divisors (6905229).

20497011 is a wasteful number, since it uses less digits than its factorization.

20497011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18225.

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 20497011 is about 4527.3624772046. The cubic root of 20497011 is about 273.6718815484.

The spelling of 20497011 in words is "twenty million, four hundred ninety-seven thousand, eleven".