20011497 has 16 divisors (see below), whose sum is σ = 29184960. Its totient is φ = 12096000.

The previous prime is 20011489. The next prime is 20011501. The reversal of 20011497 is 79411002.

It is not a de Polignac number, because 20011497 - 2³ = 20011489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20011097) 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 15 ways as a sum of consecutive naturals, for example, 19329 + ... + 20337.

It is an arithmetic number, because the mean of its divisors is an integer number (1824060).

Almost surely, 2^20011497 is an apocalyptic number.

It is an amenable number.

20011497 is a deficient number, since it is larger than the sum of its proper divisors (9173463).

20011497 is a wasteful number, since it uses less digits than its factorization.

20011497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1624.

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

The square root of 20011497 is about 4473.4211740009. The cubic root of 20011497 is about 271.4937644617.

Adding to 20011497 its reverse (79411002), we get a palindrome (99422499).

The spelling of 20011497 in words is "twenty million, eleven thousand, four hundred ninety-seven".