20706461 has 8 divisors (see below), whose sum is σ = 21319680. Its totient is φ = 20100528.

The previous prime is 20706457. The next prime is 20706503. The reversal of 20706461 is 16460702.

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

It is a cyclic number.

It is not a de Polignac number, because 20706461 - 2² = 20706457 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20706461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20706401) 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, 4235 + ... + 7703.

It is an arithmetic number, because the mean of its divisors is an integer number (2664960).

Almost surely, 2^20706461 is an apocalyptic number.

It is an amenable number.

20706461 is a deficient number, since it is larger than the sum of its proper divisors (613219).

20706461 is a wasteful number, since it uses less digits than its factorization.

20706461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3643.

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

The square root of 20706461 is about 4550.4352539070. The cubic root of 20706461 is about 274.6009020750.

The spelling of 20706461 in words is "twenty million, seven hundred six thousand, four hundred sixty-one".