20955706 has 8 divisors (see below), whose sum is σ = 32164704. Its totient is φ = 10234140.

The previous prime is 20955667. The next prime is 20955707. The reversal of 20955706 is 60755902.

20955706 = 260² + 261² + ... + 431².

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

It is a super-2 number, since 2×20955706² = 878283227916872, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20955707) 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, 121750 + ... + 121921.

It is an arithmetic number, because the mean of its divisors is an integer number (4020588).

Almost surely, 2^20955706 is an apocalyptic number.

20955706 is a deficient number, since it is larger than the sum of its proper divisors (11208998).

20955706 is a wasteful number, since it uses less digits than its factorization.

20955706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243716.

The product of its (nonzero) digits is 18900, while the sum is 34.

The square root of 20955706 is about 4577.7402722304. The cubic root of 20955706 is about 275.6983068330.

The spelling of 20955706 in words is "twenty million, nine hundred fifty-five thousand, seven hundred six".