20461807 has 8 divisors (see below), whose sum is σ = 20821680. Its totient is φ = 20105280.

The previous prime is 20461787. The next prime is 20461813. The reversal of 20461807 is 70816402.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20461807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20461817) 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, 13563 + ... + 14995.

It is an arithmetic number, because the mean of its divisors is an integer number (2602710).

Almost surely, 2^20461807 is an apocalyptic number.

20461807 is a deficient number, since it is larger than the sum of its proper divisors (359873).

20461807 is a wasteful number, since it uses less digits than its factorization.

20461807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1673.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 20461807 is about 4523.4728914850. The cubic root of 20461807 is about 273.5151129037.

The spelling of 20461807 in words is "twenty million, four hundred sixty-one thousand, eight hundred seven".