20419465 has 16 divisors (see below), whose sum is σ = 28304640. Its totient is φ = 13976320.

The previous prime is 20419459. The next prime is 20419481. The reversal of 20419465 is 56491402.

It is not a de Polignac number, because 20419465 - 2¹¹ = 20417417 is a prime.

It is an unprimeable number.

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, 9985 + ... + 11854.

It is an arithmetic number, because the mean of its divisors is an integer number (1769040).

Almost surely, 2^20419465 is an apocalyptic number.

It is an amenable number.

20419465 is a deficient number, since it is larger than the sum of its proper divisors (7885175).

20419465 is a wasteful number, since it uses less digits than its factorization.

20419465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21872.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 20419465 is about 4518.7902142056. The cubic root of 20419465 is about 273.3263193058.

The spelling of 20419465 in words is "twenty million, four hundred nineteen thousand, four hundred sixty-five".