20497461 has 16 divisors (see below), whose sum is σ = 29937600. Its totient is φ = 12416768.

The previous prime is 20497429. The next prime is 20497481. The reversal of 20497461 is 16479402.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20497461 - 2⁵ = 20497429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20497481) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 5451 + ... + 8408.

It is an arithmetic number, because the mean of its divisors is an integer number (1871100).

Almost surely, 2^20497461 is an apocalyptic number.

It is an amenable number.

20497461 is a deficient number, since it is larger than the sum of its proper divisors (9440139).

20497461 is a wasteful number, since it uses less digits than its factorization.

20497461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13908.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 20497461 is about 4527.4121747418. The cubic root of 20497461 is about 273.6738843030.

The spelling of 20497461 in words is "twenty million, four hundred ninety-seven thousand, four hundred sixty-one".