20461670 has 16 divisors (see below), whose sum is σ = 38769840. Its totient is φ = 7753824.

The previous prime is 20461633. The next prime is 20461673. The reversal of 20461670 is 7616402.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20461673) 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 7 ways as a sum of consecutive naturals, for example, 53657 + ... + 54036.

It is an arithmetic number, because the mean of its divisors is an integer number (2423115).

Almost surely, 2^20461670 is an apocalyptic number.

20461670 is a deficient number, since it is larger than the sum of its proper divisors (18308170).

20461670 is a wasteful number, since it uses less digits than its factorization.

20461670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107719.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 20461670 is about 4523.4577482276. The cubic root of 20461670 is about 273.5145024712.

The spelling of 20461670 in words is "twenty million, four hundred sixty-one thousand, six hundred seventy".