20705402 has 8 divisors (see below), whose sum is σ = 32692800. Its totient is φ = 9807804.

The previous prime is 20705387. The next prime is 20705407. The reversal of 20705402 is 20450702.

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

It is not an unprimeable number, because it can be changed into a prime (20705407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 272402 + ... + 272477.

It is an arithmetic number, because the mean of its divisors is an integer number (4086600).

Almost surely, 2^20705402 is an apocalyptic number.

20705402 is a deficient number, since it is larger than the sum of its proper divisors (11987398).

20705402 is a wasteful number, since it uses less digits than its factorization.

20705402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544900.

The product of its (nonzero) digits is 560, while the sum is 20.

The square root of 20705402 is about 4550.3188899241. The cubic root of 20705402 is about 274.5962206487.

The spelling of 20705402 in words is "twenty million, seven hundred five thousand, four hundred two".